CVE-2025-14847 KEV
7.5
HIGH · CVSS 3.1 · EPSS 83.2% (pctl 100)
Patch first
On CISA KEV — known exploited in the wild, due 2026-01-19.
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.
Scoring
| CVSS | 7.5 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| EPSS | 83.22% — more likely to be exploited than 100% of all CVEs |
| Weakness | CWE-130 |
| On CISA KEV | yes — remediate by 2026-01-19 |
| Public exploit | none known |
| Published | 2025-12-19 |
| Last modified | 2026-06-17 |
CISA KEV
| Name | MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability |
|---|---|
| Added | 2025-12-29 |
| Due | 2026-01-19 |
| Vendor / product | MongoDB / MongoDB and MongoDB Server |
| Ransomware use | none reported |
Affected (1)
| Vendor | Product |
|---|---|
| mongodb | mongodb |
References
- 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
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