High
activemq — security advisory
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.
- Products
- activemq
- Affected versions
- 5.13.2+dfsg-2, 5.13.2+dfsg-2ubuntu0.1~esm1, 5.14.5-3, 5.15.10-1, 5.15.11-1, 5.15.11-1ubuntu0.1~esm1, 5.15.2-2, 5.15.3-2, 5.15.8-2~18.04, 5.15.8-2~18.04.1~esm1, 5.16.1-1, 5.16.1-1ubuntu0.1, 5.16.1-1ubuntu0.1~esm1, 5.17.2+dfsg-2, 5.17.6+dfsg-1, 5.17.6+dfsg-2, 5.17.6+dfsg-2ubuntu1, 5.6.0+dfsg1-4+deb8u1ubuntu1, 5.6.0+dfsg1-5
- Fixed versions
- Not specified
- CVEs
- CVE-2026-40046
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 03:02 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-40046
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
activemq
Fixed versions: Not specified
Complete source record
{
"id": "497d5e3a46867b3e701bf60a91287faa493c3e59fd1fb191238fd3fb3930762d",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-40046",
"method": "structured",
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"modified": "2026-10-17T13:00:03.539780744Z",
"provider": "osv",
"upstream": [
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],
"references": [
"https://ubuntu.com/security/CVE-2026-40046",
"https://www.cve.org/CVERecord?id=CVE-2026-40046",
"https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt",
"https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg",
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"evidence": "/upstream"
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"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 360212,
"published_at": "2026-04-09T17:16:00+00:00"
}