Vulnerability DatabaseCVE-2025-14847
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CVE-2025-14847
December 19, 2025
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.
Affected Packages
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r5.0.0-alpha <r5.0.32
Fix Suggestion:
Update to version r5.0.32
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r8.0.0-alpha <r8.0.17
Fix Suggestion:
Update to version r8.0.17
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r8.2.0-alpha <r8.2.3
Fix Suggestion:
Update to version r8.2.3
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r4.4.0-rc0 <r4.4.30
Fix Suggestion:
Update to version r4.4.30
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r6.0.0-alpha <r6.0.27
Fix Suggestion:
Update to version r6.0.27
https://github.com/mongodb/mongo.git (GITHUB):
Affected version(s) >=r7.0.0-alpha0 <r7.0.28
Fix Suggestion:
Update to version r7.0.28
Related Resources (6)
http://www.openwall.com/lists/oss-security/2025/12/29/21
https://www.vicarius.io/vsociety/posts/cve-2025-14847-detection-script-heap-memory-exposure-in-mongodb-server
https://jira.mongodb.org/browse/SERVER-115508
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
https://www.smartkeyss.com/post/mongobleed-pre-auth-memory-disclosure-via-op_compressed-in-mongodb-cve-2025-14847
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CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
ATTACKED
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Exploit Maturity
FUNCTIONAL
Weakness Type (CWE)
Improper Handling of Length Parameter Inconsistency
CWE-130
EPSS
Base Score:
68.24