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GHSA-C86R-9HM3-5PCC

Vulnerability from github – Published: 2026-11-04 12:31 – Updated: 2026-11-04 12:31

Details

Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB.

A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable.

This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12.

Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.

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  "id": "GHSA-c86r-9hm3-5pcc",
  "modified": "2026-11-04T12:31:29Z",
  "published": "2026-11-04T12:31:29Z",
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CVE-2026-111821 (GCVE-0-2026-111821)

Vulnerability from cvelistv5 – Published: 2026-11-04 10:10 – Updated: 2026-11-04 10:10

Title

Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal

Summary

Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12. Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.

Severity

No CVSS data available.

CWE

CWE-20 - Improper input validation

Assigner

apache CNA under the mitre root

CNA scorecard B 76/100 over 1121 records in the last 180 days details

References

2 references

URL	Tags
https://lists.apache.org/thread/p8gxq66lmztkrls74…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/1…

Impacted products

2 products

Vendor	Product	Version
Apache Software Foundation	Apache ActiveMQ	Affected: 6.0.0 , < 6.3.3 (semver) Affected: 0 , < 5.19.12 (semver)
Apache Software Foundation	Apache ActiveMQ KahaDB	Affected: 6.0.0 , < 6.3.3 (semver) Affected: 0 , < 5.19.12 (semver)

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JSON

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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