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TI-2026-10294 Aliases CVE-2026-11933GHSA-x5xf-rwjm-436w

Post-authentication use-after-free in server-side JavaScript BSON-to-array conversion

Priority MEDIUM 40CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents to JavaScript arrays. An authenticated user with read privileges who is able to run server-side JavaScript (for example, via $where or $function) can cause the server to access memory that has already been freed. This may result in disclosure of information from the mongod process memory or a denial of service through a server crash.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MongoDBMongoDB8.3.0 – 8.3.3; 8.2.0 – 8.2.10; 8.0.0 – 8.0.25; 7.0.0 – 7.0.36; 6.0 – 6.0.28; 5.0 – 5.0.33; 4.4.0 – 4.4.30—No fix listedCNA
  • MongoDB VendorMongoDB Affected 8.3.0 – 8.3.3; 8.2.0 – 8.2.10; 8.0.0 – 8.0.25; 7.0.0 – 7.0.36; 6.0 – 6.0.28; 5.0 – 5.0.33; 4.4.0 – 4.4.30 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*4.4.0 to before 4.4.31; 5.0.0 to before 5.0.34; 6.0.0 to before 6.0.29; 7.0.0 to before 7.0.37; 8.0.0 to before 8.0.26; 8.2.0 to before 8.2.11; 8.3.0 to before 8.3.4VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* Versions 4.4.0 to before 4.4.31; 5.0.0 to before 5.0.34; 6.0.0 to before 6.0.29; 7.0.0 to before 7.0.37; 8.0.0 to before 8.0.26; 8.2.0 to before 8.2.11; 8.3.0 to before 8.3.4 Vulnerable ·MongoDB

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-11933
  2. 2026-10-03 Alias added: GHSA-x5xf-rwjm-436w

References

Patch 1

  • TI-2025-13542 Zlib compressed protocol header length confusion may allow memory read KEVCVSS 4.0HIGH 8.7
  • TI-2013-01669 MongoDB before 2.0.9 and 2.2.x before 2.2.4 does not properly validate requests to the… CVSS 2.0MEDIUM 6.0
  • TI-2026-56639 Uncontrolled Resource Consumption in MongoDB Sharded Cluster Router Allows Unauthenticated Denial of Service CVSS 4.0HIGH 8.7
  • TI-2026-56628 Reachable assertion in MongoDB Server CVSS 4.0HIGH 8.7
  • TI-2026-15322 Improper Input Validation in MongoDB Aggregation Framework Allows Unauthenticated Denial of Service on mongos CVSS 4.0HIGH 8.7
  • TI-2026-08537 Unbounded recursion in BSONColumn interleaved-reference causes pre-auth stack overflow CVSS 4.0HIGH 8.7
See all 187 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences