CVE Explorer
CVE-2026-40046
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 v
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1
Preserved source conflicts
No provider value was silently selected as the winner.
affected · 3 assertions
{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:apache-activemq","product":"Apache ActiveMQ","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/0
{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:activemq-mqtt","product":"Apache ActiveMQ MQTT","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/2
{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:activemq-all","product":"Apache ActiveMQ All","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/1
Affected products and versions
3 source assertions{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:apache-activemq","product":"Apache ActiveMQ","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/0
{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:activemq-mqtt","product":"Apache ActiveMQ MQTT","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/2
{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.activemq:activemq-all","product":"Apache ActiveMQ All","vendor":"Apache Software Foundation","versions":[{"lessThan":"6.2.4","status":"affected","version":"6.0.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/affected/1
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/adp/0/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-190","description":"CWE-190 Integer Overflow or Wraparound","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"tags":["vendor-advisory"],"url":"https://activemq.apache.org/security-advisories.data/CVE-2026-40046-announcement.txt"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/references/1
{"tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/zdntj5rcgjjzrpow84o339lzldy68zrg"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/references/2
{"tags":["related"],"url":"https://www.cve.org/CVERecord?id=CVE-2025-66168"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:82a71e638984737bf0234644f65b3f2394c972ed9f7c7eb443206ef635e5d2ad · sha256:16d884e87cdb9c6c… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.