Apache ActiveMQ, Apache ActiveMQ KahaDB: Oversized client identifier strings poison the KahaDB journal
CVSS score
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EPSS probability
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Risk score
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Published
3 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%63
Short explanation
An improper input validation vulnerability exists in Apache ActiveMQ and Apache ActiveMQ KahaDB, leading to KahaDB journal poisoning. This issue can cause the broker to shut down and become unrecoverable.
It must be handled carefully because it can cause unrecoverable shutdowns, leading to service disruption and permanent loss of access on affected brokers.
What should be done?
- Upgrade to versions 6.4.0, 6.3.3, or 5.19.12
- Follow the vendor advisory
Chain of evidence and sources
Apache ActiveMQ ve Apache ActiveMQ KahaDB uygunsuz girdi doğrulaması zafiyetinden etkilenmektedir.
65,535 karakterden uzun birleşik clientId ve abonelik adı KahaDB günlüğünü zehirleyebilir.
Sorun 6.0.0 ile 6.3.3 arasındaki ve 5.19.12 öncesi sürümleri etkilemektedir.
Show the technical text from the sources
Improper input validation vulnerability in Apache ActiveMQ, Apache ActiveMQ KahaDB. A user can create a durable subscription with a clientId and subscription name that have a combined length > 65,535 (while separately being shorter) on a broker using KahaDB which can cause the broker to shutdown and be unrecoverable. This issue affects Apache ActiveMQ: from 6.0.0 before 6.3.3, before 5.19.12; Apache ActiveMQ KahaDB: from 6.0.0 before 6.3.3, before 5.19.12. Users are recommended to upgrade to version 6.4.0, 6.3.3 or 5.19.12, which fixes the issue.
CWE: CWE-20
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-111821 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-111821 weaknesses.
Official Sources and Advisories
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Weakness Type (CWE & CAPEC)
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