CVE-2025-14847

Summary

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.

Impact & exploitability

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products we track (1)

Recommendation

This vulnerability is being actively exploited in the wild — patch affected products urgently. Open any affected product above for its exact safe version.

Official patch: https://jira.mongodb.org/browse/SERVER-115508 ↗

Additional information

• NVD record
• https://jira.mongodb.org/browse/SERVER-115508Patch
• http://www.openwall.com/lists/oss-security/2025/12/29/21
• https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847Advisory
• https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-serverAdvisory
• https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-serverAdvisory