CVE-2025-14847

high-risk
Published 2025-12-19

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.

Do I need to act?

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77.5% chance of exploitation in next 30 days
EPSS score — higher than 22% of all CVEs
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Mongodb

References (6)

Issue Tracking https://jira.mongodb.org/browse/SERVER-115508
Mailing List http://www.openwall.com/lists/oss-security/2025/12/29/21
Technical Description https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_com...
Exploit https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memo...
Exploit https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-mem...
Third Party Advisory https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-...
60
/ 100
high-risk
Severity 26/34 · High
Exploitability 27/34 · High
Exposure 7/34 · Low