CVE-2026-111821: Apache ActiveMQ KahaDB vulnerable to oversized client identifier poisoning (CVE-2026-111821)
Combined clientId and subscription name exceeding 65,535 bytes can poison the KahaDB journal in versions before 6.3.3 and 5.19.12.
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Combined clientId and subscription name exceeding 65,535 bytes can poison the KahaDB journal in versions before 6.3.3 and 5.19.12.

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