CVE catalog

CVE-2025-27533

activemq: CVE-2025-27533

Severity: Medium · CVSS 4.9CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Published: May 6, 2025, 10:00:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 8.96% · Oct 25, 2026

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ. During unmarshalling of OpenWire commands the size value of buffers was not properly validated which could lead to excessive memory allocation and be exploited to cause a denial of service (DoS) by depleting process memory, thereby affecting applications and services that rely on the availability of the ActiveMQ broker when not using mutual TLS connections. This issue affects Apache ActiveMQ: from 6.0.0 before 6.1.6, from 5.18.0 before 5.18.7, from 5.17.0 before 5.17.7, before 5.16.8. ActiveMQ 5.19.0 is not affected. Users are recommended to upgrade to version 6.1.6+, 5.19.0+, 5.18.7+, 5.17.7, or 5.16.8 or which fixes the issue. Existing users may implement mutual TLS to mitigate the risk on affected brokers.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	activemq	sid	`5.17.6+dfsg-2`	fixed
Debian	activemq	trixie	`5.17.6+dfsg-2`	fixed
Debian	activemq	bookworm	`5.17.2+dfsg-2+deb12u1`	vulnerable
Debian	activemq	bookworm-security	`5.17.2+dfsg-2+deb12u1`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	activemq	source	sid	`5.17.6+dfsg-2`	not yet assigned	Not reported	[1104933]
Debian	activemq	source	trixie	`5.17.6+dfsg-2`	not yet assigned	Not reported	[1104933]
Debian	activemq	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1104933]

[Debian bug #1104933]

Notes

[bookworm] activemq: Minor issue, DoS

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[activemq]Affected
Details (4)
- 5.17.2+dfsg-2+deb12u1 · all · bookworm
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm-security
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm-security
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
[libactivemq-java]Affected
Source package: [activemq]
Details (4)
- 5.17.2+dfsg-2+deb12u1 · all · bookworm
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm-security
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12
- 5.17.2+dfsg-2+deb12u1 · all · bookworm-security
  Affected
  dsa · activemq · debian · bookworm; dsa · activemq · debian · 12

[Debian 13 (Trixie)]

[activemq]Fixed
Details (2)
- 5.17.6+dfsg-2 · all · trixie
  Fixed · Fixed: 5.17.6+dfsg-2
  dsa · activemq · debian · 13
- 5.17.6+dfsg-2 · all · trixie
  Fixed · Fixed: 5.17.6+dfsg-2
  dsa · activemq · debian · 13
[libactivemq-java]Fixed
Source package: [activemq]
Details (2)
- 5.17.6+dfsg-2 · all · trixie
  Fixed · Fixed: 5.17.6+dfsg-2
  dsa · activemq · debian · 13
- 5.17.6+dfsg-2 · all · trixie
  Fixed · Fixed: 5.17.6+dfsg-2
  dsa · activemq · debian · 13

Observed: Oct 24, 2026, 10:35:21 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]