{"id":15253,"date":"2026-01-06T09:27:10","date_gmt":"2026-01-06T08:27:10","guid":{"rendered":"https:\/\/clue.ch\/?p=15253"},"modified":"2026-01-20T10:43:09","modified_gmt":"2026-01-20T09:43:09","slug":"mongobleed-cve-2025-14847","status":"publish","type":"post","link":"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/","title":{"rendered":"Critical Vulnerability \u201cMongoBleed\u201d (CVE-2025-14847) found"},"content":{"rendered":"<h5>The newly disclosed vulnerability&nbsp;<b data-stringify-type=\"bold\">CVE-2025-14847 (\u201cMongoBleed\u201d)<\/b>&nbsp;affects multiple MongoDB Server versions worldwide. It allows&nbsp;<b data-stringify-type=\"bold\">unauthenticated attackers<\/b>&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;<b data-stringify-type=\"bold\">immediate action is required<\/b>.<\/h5>\r\n<h3><b data-stringify-type=\"bold\">Why Is MongoBleed Critical?<\/b><\/h3>\r\n<div class=\"p-rich_text_section\">MongoBleed affects MongoDB\u2019s&nbsp;<b data-stringify-type=\"bold\">network layer before authentication<\/b>.<br aria-hidden=\"true\" \/>Attackers only need network access to the default MongoDB port&nbsp;<b data-stringify-type=\"bold\">TCP\/27017<\/b>.The flaw abuses improper handling of&nbsp;<b data-stringify-type=\"bold\">zlib-compressed network messages<\/b>&nbsp;and may expose:<\/div>\r\n<ul class=\"p-rich_text_list p-rich_text_list__bullet p-rich_text_list--nested\" data-stringify-type=\"unordered-list\" data-list-tree=\"true\" data-indent=\"0\" data-border=\"0\">\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">Credentials<\/li>\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">API keys and tokens<\/li>\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">Session data<\/li>\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">Personally identifiable information (PII)<\/li>\r\n<\/ul>\r\n<h3><b data-stringify-type=\"bold\">Active Exploitation Confirmed<\/b><\/h3>\r\n<div class=\"p-rich_text_section\">This is not theoretical:Public PoC available since December 2025<br aria-hidden=\"true\" \/>Added to the&nbsp;<b data-stringify-type=\"bold\">CISA Known Exploited Vulnerabilities Catalog<\/b><\/div>\r\n<ul class=\"p-rich_text_list p-rich_text_list__bullet p-rich_text_list--nested\" data-stringify-type=\"unordered-list\" data-list-tree=\"true\" data-indent=\"0\" data-border=\"0\">\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">Over&nbsp;<b data-stringify-type=\"bold\">140,000 exposed MongoDB instances<\/b> identified<\/li>\r\n \t<li data-stringify-indent=\"0\" data-stringify-border=\"0\">Attacks are automated and executed at scale.<\/li>\r\n<\/ul>\r\n<b data-stringify-type=\"bold\">Who Is Affected?\r\n<\/b>You may be vulnerable if you run&nbsp;self-hosted MongoDB servers&nbsp;using:\r\n\r\n<b data-stringify-type=\"bold\">\r\n<\/b>\r\n<!-- \/wp:post-content -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4 class=\"wp-block-heading\"><strong>Vulnerable Versions:<\/strong><\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>8.2.0 \u2013 8.2.2<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>8.0.0 \u2013 8.0.16<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>7.0.0 \u2013 7.0.27<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>6.0.0 \u2013 6.0.26<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>5.0.0 \u2013 5.0.31<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>4.4.0 \u2013 4.4.29<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4 class=\"wp-block-heading\">End-of-Life (no patches):<\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>4.2, 4.0, 3.6<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:paragraph -->\r\n<strong>MongoDB Atlas customers were patched automatically.<\/strong>\r\n<strong>Self-hosted deployments must be updated manually.<\/strong>\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3 class=\"wp-block-heading\"><strong>Protection With Clue Application Protection<\/strong><\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>Customers with CLUE Application Protection are already protected against known MongoBleed attack patterns.<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nOur protection includes:\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>Real-time detection of protocol anomalies<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>Blocking of harmful network packets<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>Operational protection buffer for secure patching<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3 class=\"wp-block-heading\"><strong>What You Should Do Now<\/strong><\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4 class=\"wp-block-heading\"><strong>Patch Immediately<\/strong><\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\nMongoDB recommends upgrading to:\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>8.2.3<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>8.0.17<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>7.0.28<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>6.0.27<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>5.0.32<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>4.4.30<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:heading {\"level\":4} -->\r\n<h4 class=\"wp-block-heading\"><strong>Temporary Mitigations (If Patching Is Delayed)<\/strong><\/h4>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>Do not expose MongoDB to the public internet<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>Restrict access to private networks or VPNs<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li><strong>zDisable zlib compression or switch to snappy\/zstd<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3 class=\"wp-block-heading\"><strong>Official Sources<\/strong><\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li><strong>MongoDB Advisory:&nbsp;<\/strong><a href=\"https:\/\/mongodb.com\/company\/blog\/news\/mongodb-server-security-update-december-2025\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/mongodb.com\/company\/blog\/news\/mongodb-server-security-update-december-2025<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li><strong>MongoDB Patch Announcement:&nbsp;<\/strong><a href=\"https:\/\/www.mongodb.com\/community\/forums\/t\/important-mongodb-patch-available\/332977\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.mongodb.com\/community\/forums\/t\/important-mongodb-patch-available\/332977<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li><strong>CISA KEV Catalog:&nbsp;<\/strong><a href=\"https:\/\/www.cisa.gov\/known-exploited-vulnerabilities-catalog\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.cisa.gov\/known-exploited-vulnerabilities-catalog<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li><strong>NIST NVD CVE-2025-14847:&nbsp;<\/strong><a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2025-14847\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2025-14847<\/a><\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<!-- wp:spacer -->\r\n<div class=\"wp-block-spacer\" style=\"height: 100px;\" aria-hidden=\"true\">&nbsp;<\/div>\r\n<!-- \/wp:spacer -->\r\n\r\n<!-- wp:columns -->\r\n<div class=\"wp-block-columns\">\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:heading {\"level\":3} -->\r\n<h3 class=\"wp-block-heading\"><strong>Need Help?<\/strong><\/h3>\r\n<!-- \/wp:heading -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<!-- wp:column {\"width\":\"50%\"} -->\r\n<div class=\"wp-block-column\" style=\"flex-basis: 50%;\">\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>Our security team can assist with:<\/strong>\r\n\r\n<!-- \/wp:paragraph -->\r\n\r\n<!-- wp:list -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\"><!-- wp:list-item -->\r\n \t<li>Exposure-Analysis<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>Protection validation<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- wp:list-item -->\r\n<ul class=\"wp-block-list\">\r\n \t<li style=\"list-style-type: none;\">\r\n<ul class=\"wp-block-list\">\r\n \t<li>Secure patch coordination<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n<!-- \/wp:list-item -->\r\n\r\n<!-- \/wp:list -->\r\n\r\n<\/div>\r\n<!-- \/wp:column -->\r\n\r\n<\/div>\r\n<!-- \/wp:columns -->\r\n\r\n<!-- wp:paragraph -->\r\n\r\n<strong>Contact CLUE Cyber Secure \u2014 we protect your applications before attackers act.<\/strong>\r\n\r\n<!-- \/wp:paragraph -->","protected":false},"excerpt":{"rendered":"<p>The newly disclosed vulnerability&nbsp;CVE-2025-14847 (\u201cMongoBleed\u201d)&nbsp;affects multiple MongoDB Server versions worldwide. It allows&nbsp;unauthenticated attackers&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;immediate action is required. Why Is MongoBleed Critical? MongoBleed affects MongoDB\u2019s&nbsp;network layer before authentication.Attackers only need network access to the default MongoDB port&nbsp;TCP\/27017.The flaw abuses improper handling of&nbsp;zlib-compressed network messages&nbsp;and may [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":15263,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[54],"tags":[],"class_list":["post-15253","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-security-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Critical Vulnerability \u201cMongoBleed\u201d (CVE-2025-14847) found<\/title>\n<meta name=\"description\" content=\"The newly disclosed vulnerability&nbsp;CVE-2025-14847 (\u201cMongoBleed\u201d)&nbsp;affects multiple MongoDB Server versions worldwide. It allows&nbsp;unauthenticated attackers&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;immediate action is required. Why Is MongoBleed Critical? MongoBleed affects MongoDB\u2019s&nbsp;network layer before authentication.Attackers only need network access to the default MongoDB port&nbsp;TCP\/27017.The flaw abuses improper handling of&nbsp;zlib-compressed network messages&nbsp;and may&hellip;\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/The%20newly%20disclosed%20vulnerability&nbsp;CVE-2025-14847%20(\u201cMongoBleed\u201d)&nbsp;affects%20multiple%20MongoDB%20Server%20versions%20worldwide.%20It%20allows&nbsp;unauthenticated%20attackers&nbsp;to%20extract%20sensitive%20memory%20data%20directly%20from%20server%20RAM.%20With%20active%20exploitation%20confirmed,&nbsp;immediate%20action%20is%20required.%20Why%20Is%20MongoBleed%20Critical?%20MongoBleed%20affects%20MongoDB\u2019s&nbsp;network%20layer%20before%20authentication.Attackers%20only%20need%20network%20access%20to%20the%20default%20MongoDB%20port&nbsp;TCP\/27017.The%20flaw%20abuses%20improper%20handling%20of&nbsp;zlib-compressed%20network%20messages&nbsp;and%20may&hellip;\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Critical Vulnerability \u201cMongoBleed\u201d (CVE-2025-14847) found\" \/>\n<meta property=\"og:description\" content=\"The newly disclosed vulnerability&nbsp;CVE-2025-14847 (\u201cMongoBleed\u201d)&nbsp;affects multiple MongoDB Server versions worldwide. It allows&nbsp;unauthenticated attackers&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;immediate action is required. Why Is MongoBleed Critical? MongoBleed affects MongoDB\u2019s&nbsp;network layer before authentication.Attackers only need network access to the default MongoDB port&nbsp;TCP\/27017.The flaw abuses improper handling of&nbsp;zlib-compressed network messages&nbsp;and may&hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/\" \/>\n<meta property=\"og:site_name\" content=\"CLUE\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.instagram.com\/clue.security\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-01-06T08:27:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-20T09:43:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/clue.de\/wp-content\/uploads\/2026\/01\/Blogpost_2026-01-2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"900\" \/>\n\t<meta property=\"og:image:height\" content=\"420\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Nikita Lukash\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Nikita Lukash\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":[\"Article\",\"BlogPosting\"],\"@id\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/\"},\"author\":{\"name\":\"Nikita Lukash\",\"@id\":\"https:\/\/clue.ch\/#\/schema\/person\/a4718b15f08add4dfe293f900caa7dcf\"},\"headline\":\"Critical Vulnerability \u201cMongoBleed\u201d (CVE-2025-14847) found\",\"datePublished\":\"2026-01-06T08:27:10+00:00\",\"dateModified\":\"2026-01-20T09:43:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/\"},\"wordCount\":306,\"publisher\":{\"@id\":\"https:\/\/clue.ch\/#organization\"},\"image\":{\"@id\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/clue.de\/wp-content\/uploads\/2026\/01\/Blogpost_2026-01-2.png\",\"articleSection\":[\"Security News\"],\"inLanguage\":\"en-GB\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/\",\"url\":\"https:\/\/clue.de\/en\/blog\/mongobleed-cve-2025-14847\/\",\"name\":\"Kritische Sicherheitsl\u00fccke \u201eMongoBleed\u201d (CVE-2025-14847) entdeckt &#8211; 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It allows&nbsp;unauthenticated attackers&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;immediate action is required. Why Is MongoBleed Critical? MongoBleed affects MongoDB\u2019s&nbsp;network layer before authentication.Attackers only need network access to the default MongoDB port&nbsp;TCP\/27017.The flaw abuses improper handling of&nbsp;zlib-compressed network messages&nbsp;and may&hellip;","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"The newly disclosed vulnerability&nbsp;CVE-2025-14847 (\u201cMongoBleed\u201d)&nbsp;affects multiple MongoDB Server versions worldwide. It allows&nbsp;unauthenticated attackers&nbsp;to extract sensitive memory data directly from server RAM. With active exploitation confirmed,&nbsp;immediate action is required. Why Is MongoBleed Critical? 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