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CVE-2026-50734VulnerabilityPublished Updated

Org.apache.activemq:activemq client: Apache ActiveMQ Client, Apache ActiveMQ, Apache ActiveMQ All has a Memory

Affects org.apache.activemq:activemq-clientSource GCVE Database

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Authoritative record:CVE-2026-50734· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade to 5.19.8 soon.

Data as of 5 Nov 2026, 00:01 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 5.19.8, 6.2.7
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

What to do

Upgrade org.apache.activemq:activemq-client and org.apache.activemq:apache-activemq and org.apache.activemq:activemq-all to 5.19.8; org.apache.activemq:activemq-client and org.apache.activemq:apache-activemq and org.apache.activemq:activemq-all to 6.2.7.

Affected software

ProductAffectedFixed in
Mavenorg.apache.activemq:activemq-clientAffected
  • <5.19.8
Fixed in
  • 5.19.8
Mavenorg.apache.activemq:activemq-clientAffected
  • >=6.0.0 <6.2.7
Fixed in
  • 6.2.7
Mavenorg.apache.activemq:apache-activemqAffected
  • <5.19.8
Fixed in
  • 5.19.8
Mavenorg.apache.activemq:apache-activemqAffected
  • >=6.0.0 <6.2.7
Fixed in
  • 6.2.7
Mavenorg.apache.activemq:activemq-allAffected
  • <5.19.8
Fixed in
  • 5.19.8
Mavenorg.apache.activemq:activemq-allAffected
  • >=6.0.0 <6.2.7
Fixed in
  • 6.2.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Users should upgrade to Apache ActiveMQ Client or Apache ActiveMQ versions 5.19.8 or 6.2.7 or later, where this vulnerability is fixed. Since a patch is available and the issue is resolved in these versions, upgrading is the recommended mitigation.

Description

Apache ActiveMQ Client and Apache ActiveMQ contain a vulnerability where an unauthenticated network attacker can cause a denial of service (DoS) by sending a crafted WireFormatInfo frame with a maliciously large size value. This triggers an out-of-memory (OOM) condition during pre-authentication negotiation, crashing the broker. Versions before 5.19.8 and from 6.0.0 before 6.2.7 are affected. The issue is fixed in versions 5.19.8 and 6.2.7.

References

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