⚠️ CISA Known Exploited Vulnerability
Active ThreatThis vulnerability is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog. Active exploitation has been observed in the wild. This poses significant risk to federal enterprises and should be prioritized for immediate patching.
CVE-2025-14847
High CISA KEVVulnerability Description
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.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
References & Resources
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https://jira.mongodb.org/browse/SERVER-115508cna@mongodb.com Issue Tracking Patch Vendor Advisory
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http://www.openwall.com/lists/oss-security/2025/12/29/21af854a3a-2127-422b-91ae-364da2661108 Mailing List
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https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847af854a3a-2127-422b-91ae-364da2661108 Technical Description Third Party Advisory
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https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-serveraf854a3a-2127-422b-91ae-364da2661108 Exploit Third Party Advisory
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https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-serveraf854a3a-2127-422b-91ae-364da2661108 Exploit Third Party Advisory
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https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847134c704f-9b21-4f2e-91b3-4a467353bcc0 Third Party Advisory US Government Resource
Severity Details
CISA KEV Status
Listed in CISA's Known Exploited Vulnerabilities catalog
Key Information
- Published Date
- December 19, 2025
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