What happened
An unauthenticated remote attacker can craft a CORE protocol SESSION_REATTACH packet to steal an existing session and assume ongoing execution of the previously authenticated session. This issue affects Apache Artemis: from 2.50.0 through 2.56.0; Apache ActiveMQ Artemis: from 1.0.0 through 2.44.0. Users are recommended to upgrade to version 2.57.0, which fixes the issue.
Affected versions
Apache Artemis: 2.50.0 through 2.56.0 (semver); 1.0.0 through 2.44.0 (semver) Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
RepositoryAuthorFirst seenReference
SploitusUnauthenticated remote hijacking of an authenticated CORE-protocol session in Apache Artemis.c0dem4sters2026-10-06T19:28:22Verifiedc0dem4sters/CVE-2026-57967Unauthenticated remote hijacking of an authenticated CORE-protocol session in Apache Artemis.c0dem4sters2026-10-06T19:28:22VerifiedSource timeline
CVE record published by NVDView source ↗
Record history
Record created from the first normalized source observation.
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