{"id":"CVE-2025-14847","published":"2025-12-19T11:15:49Z","modified":"2026-06-17T08:36:38Z","title":"MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability","vendor":"MongoDB","product":"MongoDB and MongoDB Server","tier":"core","eol":null,"description":{"text":"Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.","provenance":"source","from":"NVD"},"summary":{"text":"MongoDB and MongoDB Server contain an improper handling of length parameter inconsistency in the Zlib compressed protocol header processing. An unauthenticated remote client can send a request with mismatched length fields in these headers over the network, with no user interaction or special configuration required, to read uninitialized heap memory from the server.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:58Z"},"cvss":{"score":7.5,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","provenance":"source","from":"NVD"},"epss":{"score":0.83218,"percentile":0.99677,"date":"2026-10-30","provenance":"source"},"kev":{"dateAdded":"2025-12-29","dueDate":"2026-01-19","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","notes":"This vulnerability could affect an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://jira.mongodb.org/browse/SERVER-115508 ; https://nvd.nist.gov/vuln/detail/CVE-2025-14847","provenance":"source"},"vulncheckKev":{"dateAdded":"2025-12-28","exploitedFirstSeen":"2025-12-28","ransomware":false,"evidence":[{"url":"https://www.wiz.io/blog/mongobleed-cve-2025-14847-exploited-in-the-wild-mongodb","date":"2025-12-28"},{"url":"https://www.bitsight.com/blog/critical-vulnerability-alert-cve-2025-14847-mongodb-mongobleed","date":"2025-12-29"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2025-12-29"},{"url":"https://www.cyber.gov.au/about-us/view-all-content/alerts-and-advisories/vulnerability-in-mongodb-product-mongodb-server-leak","date":"2025-12-29"},{"url":"https://www.shadowserver.org/what-we-do/network-reporting/open-mongodb-report/","date":"2025-12-29"},{"url":"https://www.recordedfuture.com/blog/december-2025-cve-landscape","date":"2026-01-13"},{"url":"https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025","date":"2026-01-20"},{"url":"https://go.flashpoint.io/2026-Global-Threat-Intelligence-Report-Download","date":"2026-03-11"},{"url":"https://www.wiz.io/reports/cloud-threat-retrospective-2026","date":"2026-04-09"}],"evidenceTotal":9,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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client","start":61,"end":135}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1005","name":"Data from Local System","tactics":["collection"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: Reads uninitialized heap memory, leaking sensitive data","mappingType":"primary_impact","evidence":[{"from":"description","quote":"may allow a read of uninitialized heap memory","start":61,"end":106}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2025-204529","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-204529","exploited":true,"exploitedSince":"2025-12-29","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":39,"skipped":3,"earliest":"2025-07-30","earliestUrl":"https://github.com/sakthivel10q/CVE-2025-14847","repos":[{"name":"Black1hp/mongobleed-scanner","url":"https://github.com/Black1hp/mongobleed-scanner","stars":36,"created":"2025-12-27"},{"name":"cybertechajju/CVE-2025-14847_Expolit","url":"https://github.com/cybertechajju/CVE-2025-14847_Expolit","stars":35,"created":"2025-12-27"},{"name":"ProbiusOfficial/CVE-2025-14847","url":"https://github.com/ProbiusOfficial/CVE-2025-14847","stars":27,"created":"2025-12-26"},{"name":"onewinner/CVE-2025-14847","url":"https://github.com/onewinner/CVE-2025-14847","stars":15,"created":"2025-12-26"},{"name":"Security-Phoenix-demo/mongobleed-exploit-CVE-2025-14847","url":"https://github.com/Security-Phoenix-demo/mongobleed-exploit-CVE-2025-14847","stars":13,"created":"2025-12-29"}]},"metasploit":[{"name":"MongoDB 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