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TI-2026-85011 Aliases CVE-2026-111821GHSA-c86r-9hm3-5pcc

Oversized durable subscription IDs crash Apache ActiveMQ KahaDB brokers

Priority LOW 22CWE-20Published · Updated

Key facts

Attack vector
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Privileges required
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User interaction
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Attack complexity
—
Impact type
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Confidentiality · integrity · availability
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Fix status
Partial Red Hat: 1 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

Apache ActiveMQ and Apache ActiveMQ KahaDB from 6.0.0 before 6.3.3 and before 5.19.12 are affected. Improper input validation (CWE-20) fails to limit the combined length of a durable subscription's clientId and subscription name. A user who can create a durable subscription on a broker using KahaDB can exceed 65,535 combined characters and make the broker shut down in a state it cannot recover from.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

EPSS 0.00216 12th percentileScored 2026-11-07
Fix Partial Apache ActiveMQ (Apache Software Foundation): 6.3.3, 5.19.12Apache ActiveMQ KahaDB (Apache Software Foundation): 6.3.3, 5.19.12Red Hat: 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache ActiveMQ6.0.0 to before 6.3.3; before 5.19.126.3.3, 5.19.12Patch availableCNA
ApacheApache ActiveMQ KahaDB6.0.0 to before 6.3.3; before 5.19.126.3.3, 5.19.12Patch availableCNA
  • Apache ActiveMQ VendorApache Affected 6.0.0 to before 6.3.3; before 5.19.12 Fixed in 6.3.3, 5.19.12 Patch available CNA
  • Apache ActiveMQ KahaDB VendorApache Affected 6.0.0 to before 6.3.3; before 5.19.12 Fixed in 6.3.3, 5.19.12 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Upgrade Apache ActiveMQ and Apache ActiveMQ KahaDB to version 6.4.0, 6.3.3 or 5.19.12. Red Hat lists Red Hat Fuse 7 as affected with no fix planned.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Apache ActiveMQ (Apache Software Foundation) Fixed in 6.3.3, 5.19.12
  • Fix · CNA Apache ActiveMQ KahaDB (Apache Software Foundation) Fixed in 6.3.3, 5.19.12

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache ActiveMQ 5.19.12, 6.3.3

    5 records Highest priority Priority LOW 5 LOW

    Other records, highest priority first

    • TI-2026-85009 Repeated rejected consumer requests exhaust memory in Apache ActiveMQPriority LOW 29
    • TI-2026-85020 LDAP DN injection in Apache ActiveMQ authorization mapPriority LOW 22
    • TI-2026-85012 Apache ActiveMQ keeps write access after live ACL revocationPriority LOW 22
    Show all 5 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Fuse 7AffectedNo fix planned: Out of support scope

Timeline

  1. 2026-11-04 Threatist record created from CVE-2026-111821
  2. 2026-11-04 Alias added: GHSA-c86r-9hm3-5pcc
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

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