Unauthenticated Session Hijacking in Apache Artemis and ActiveMQ
CVE-2026-57967

9.8CRITICAL

Key Information:

Vendor

Apache
Status
Apache Artemis
Apache ActiveMQ Artemis
Vendor
CVE Published:
10 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-57967?

A vulnerability exists in Apache Artemis and ActiveMQ that allows an unauthenticated remote attacker to exploit the CORE protocol SESSION_REATTACH packet. This exploitation can potentially lead to unauthorized access by seizing control of an ongoing authenticated session. Users are urged to upgrade to version 2.57.0 to mitigate this risk.

Affected Version(s)

Apache ActiveMQ Artemis 1.0.0 <= 2.44.0

Apache Artemis 2.50.0 <= 2.56.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-57967
Created by c0dem4sters

References

https://lists.apache.org/thread/fxfjqrdsnksw5f17zs3yqo864...
vendor-advisory

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Domenico Francesco Bruscino
Fedrick Sequeira
.