MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 29/12/2025. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| mongodb | ≥ 3.6.0, < 4.4.30≥ 5.0.0, < 5.0.32≥ 6.0.0, < 6.0.27≥ 7.0.0, < 7.0.28≥ 8.0.0, < 8.0.17≥ 8.2.0, < 8.2.3 | 4.4.305.0.326.0.277.0.288.0.178.2.3 |
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.
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