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TI-2026-85009 Aliases CVE-2026-108949GHSA-5j2c-q47c-c6w5

Repeated rejected consumer requests exhaust memory in Apache ActiveMQ

Priority LOW 29CWE-401Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-401.

Summary

Apache ActiveMQ and ActiveMQ Broker from 6.0.0 before 6.3.3, and before 5.19.12, are affected. A missing release of memory (CWE-401) lets an authenticated OpenWire client exhaust broker heap: subscriptions rejected for a temporary destination owned by another connection stay in the subscriptions map, so repeated requests lead to an out-of-memory condition and denial of service.

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

Description from the CNA

Denial of Service via OOM vulnerability in Apache ActiveMQ, ActiveMQ Broker. An authenticated OpenWire client that sends a ConsumerInfo for a temporary queue/topic owned by another connection is rejected with InvalidDestinationException, but the rejected Subscription is left behind in the region's subscriptions map. Repeating the request leaks broker heap until OOM because the broker does not clean up the rejected subscriptions in the map. This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; ActiveMQ Broker: 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

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00468 40th percentileScored 2026-11-07
Fix Partial Apache ActiveMQ (Apache Software Foundation): 6.3.3, 5.19.12ActiveMQ Broker (Apache Software Foundation): 6.3.3, 5.19.12Red Hat: 1 without a fix

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
ApacheApache ActiveMQ6.0.0 to before 6.3.3; before 5.19.126.3.3, 5.19.12Patch availableCNA
ApacheActiveMQ Broker6.0.0 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
  • ActiveMQ Broker 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 ActiveMQ Broker to version 6.4.0, 6.3.3, or 5.19.12, which fix the issue. 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 ActiveMQ Broker (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-2026-85020 LDAP DN injection in Apache ActiveMQ authorization mapPriority LOW 22
    • TI-2026-85012 Apache ActiveMQ keeps write access after live ACL revocationPriority LOW 22
    • TI-2026-85011 Oversized durable subscription IDs crash Apache ActiveMQ KahaDB brokersPriority LOW 22
    Show all 5 records →
  • Release ·

    Apache Software Foundation ActiveMQ Broker 5.19.12, 6.3.3

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-85008 Apache ActiveMQ broker accepts spoofed connection ids from clientsPriority LOW 22
    Show all 2 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-2026-108949
  2. 2026-11-04 Alias added: GHSA-5j2c-q47c-c6w5
  3. 2026-11-04 CVSS score added · CISA ADP
  4. 2026-11-04 CISA SSVC decision points changed
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 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