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CVE-2026-111821 Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal

🗓️ 04 Nov 2026 10:10:31Reported by apacheType 
cvelist
 cvelist
🔗 www.cve.org👁 9 Views

Oversized client identifiers in Apache ActiveMQ and KahaDB cause unrecoverable broker shutdown.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
circl
Circl
CVE-2026-111821
3 Nov 202621:00
–circl
cve
CVE
CVE-2026-111821
4 Nov 202610:10
–cve
euvd
EUVD
EUVD-2026-116826
4 Nov 202610:10
–euvd
mend
Mend
CVE-2026-111821
4 Nov 202610:10
–mend
nvd
NVD
CVE-2026-111821
4 Nov 202610:17
–nvd
ptsecurity
Positive Technologies
PT-2026-136761
3 Nov 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-111821: Apache Software Foundation: Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB
4 Nov 202600:00
–rapid7
[
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache ActiveMQ",
    "packageURL": "pkg:maven/org.apache.activemq/apache-activemq",
    "versions": [
      {
        "status": "affected",
        "version": "6.0.0",
        "lessThan": "6.3.3",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "0",
        "lessThan": "5.19.12",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected",
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "packageName": "org.apache.activemq:apache-activemq"
  },
  {
    "vendor": "Apache Software Foundation",
    "product": "Apache ActiveMQ KahaDB",
    "packageURL": "pkg:maven/org.apache.activemq/activemq-kahadb-store",
    "versions": [
      {
        "status": "affected",
        "version": "6.0.0",
        "lessThan": "6.3.3",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "0",
        "lessThan": "5.19.12",
        "versionType": "semver"
      }
    ],
    "defaultStatus": "unaffected",
    "collectionURL": "https://repo.maven.apache.org/maven2",
    "packageName": "org.apache.activemq:activemq-kahadb-store"
  }
]

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