Not rated
CVE-2026-40046 Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT
Description
Integer Overflow or Wraparound vulnerability in Apache ActiveMQ, Apache ActiveMQ All, Apache ActiveMQ MQTT. The fix for "CVE-2025-66168: MQTT control packet remaining length field is not properly validated" was only applied to 5.19.2 (and future 5.19.x) releases but was missed for all 6.0.0+ versions. This issue affects Apache ActiveMQ: from 6.0.0 before 6.2.4; Apache ActiveMQ All: from 6.0.0 before 6.2.4; Apache ActiveMQ MQTT: from 6.0.0 before 6.2.4. Users are recommended to upgrade to version 6.2.4 or a 5.19.x version starting with 5.19.2 or later (currently latest is 5.19.5), which fixes the issue.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache ActiveMQ 6.0 | 6.0.0 → < 6.2.4 | 6.2.4 |
| Apache ActiveMQ All 6.0 | 6.0.0 → < 6.2.4 | 6.2.4 |
| Apache ActiveMQ MQTT 6.0 | 6.0.0 → < 6.2.4 | 6.2.4 |
References
- www.cve.org www.cve.org
- activemq.apache.org activemq.apache.org
- lists.apache.org lists.apache.org
Timeline
- Published
- Last modified
Other CVEs of Apache ActiveMQ
The 40 CVEs of Apache ActiveMQ →
CVE-2026-108500
Apache ActiveMQ: LDAPAuthorizationMap allows authorization bypass via DN injection
Not rated
CVE-2026-108946
Apache ActiveMQ, ActiveMQ Broker: The broker does not verify user provided connection id matches connection
Not rated
CVE-2026-111822
Apache ActiveMQ, Apache ActiveMQ Runtime Config: ActiveMQ retains write access after live ACL revocation
Not rated
CVE-2026-111821
Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal
Not rated