high7.5Known exploited
CVE-2025-14847
MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability
Exploited in the wild
This vulnerability is on the CISA Known Exploited Vulnerabilities list, added 2025-12-29. Federal due date: 2026-01-19.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
MongoDB Server contains an improper handling of length parameter inconsistency vulnerability in Zlib compressed protocol headers. This vulnerability may allow a read of uninitialized heap memory by an unauthenticated client.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mongodb | Mongodb | from 3.6.0 before 4.4.30 from 5.0.0 before 5.0.32 from 6.0.0 before 6.0.27 from 7.0.0 before 7.0.28 from 8.0.0 before 8.0.17 from 8.2.0 before 8.2.3 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://jira.mongodb.org/browse/SERVER-115508
- 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-2025-14847
- https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-server
- https://www.vicarius.io/vsociety/posts/cve-2025-14847-mitigation-script-heap-memory-exposure-in-mongodb-server
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-14847