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TI-2026-08545 Aliases CVE-2026-9748GHSA-7r4j-g3f5-3629

$_internalConvertBucketIndexStats may crash the mongod server when working on no timeseries input

Priority LOW 31CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-617.

Summary

The $_internalConvertBucketIndexStats stage used PauseExecution as a way to signal "skip this document" when an index stats conversion failed. But PauseExecution is not a general purpose skip mechanism, but rather a TeeBuffer-internal signal used solely by $facet to coordinate its sub-pipelines. When this stage is placed before $facet in a pipeline, TeeBuffer receives the unexpected PauseExecution from upstream and hits a hard invariant assertion, crashing mongod.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00323 25th percentileScored 2026-11-07
Fix Fixed MongoDB Server (MongoDB): 8.3.3, 8.2.10, 8.0.10 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
MongoDBMongoDB Server8.3.0 to before 8.3.3; 8.2.0 to before 8.2.10; 8.0.0 to before 8.0.10; 7.0.0 to before 7.0.358.3.3, 8.2.10, 8.0.10, 7.0.35Patch availableCNA
  • MongoDB Server VendorMongoDB Affected 8.3.0 to before 8.3.3; 8.2.0 to before 8.2.10; 8.0.0 to before 8.0.10; 7.0.0 to before 7.0.35 Fixed in 8.3.3, 8.2.10, 8.0.10, 7.0.35 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:*7.0.0 to before 7.0.35; 8.0.0 to before 8.0.10; 8.2.0 to before 8.2.10; 8.3.0 to before 8.3.3VulnerableMongoDB
  • cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* Versions 7.0.0 to before 7.0.35; 8.0.0 to before 8.0.10; 8.2.0 to before 8.2.10; 8.3.0 to before 8.3.3 Vulnerable ·MongoDB

Remediation

  • Fix · CNA MongoDB Server (MongoDB) Fixed in 8.3.3, 8.2.10, 8.0.10, 7.0.35

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-9748
  2. 2026-10-03 Alias added: GHSA-7r4j-g3f5-3629

References

Advisory 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