CVE-2026-53916

Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp: Unbounded header buffer in STOMP NIO codec

Description

Memory Allocation with Excessive Size Value vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ Stomp. An unauthenticated client that opens a STOMP NIO connection can send header bytes that never terminate which makes the broker buffer them without limit, exhausting the JVM heap. This issue affects Apache ActiveMQ: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ All: before 5.19.8, from 6.0.0 before 6.2.7; Apache ActiveMQ Stomp: before 5.19.8, from 6.0.0 before 6.2.7. Users are recommended to upgrade to version 6.2.7 or 5.19.8, which fixes the issue.

Scores

Weaknesses (CWE)

• CWE-789

European references

• ENISA EUVD · EUVD-2026-40278
• GCVE · GCVE-0-2026-53916

CERT-FR advisories

• CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
• CERTFR-2026-AVI-0986 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

• cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* < 5.19.8
• cpe:2.3:a:apache:activemq:*:*:*:*:*:*:*:* ≥ 6.0.0 < 6.2.7

Affected products

References

• https://lists.apache.org/thread/07hjsj88hqgsb7vvg6ttsj56ts9vjs5n
• http://www.openwall.com/lists/oss-security/2026/06/29/13

Sources