CRITICAL: CVE-2026-51538 (CVSS 9.1) — multiple products
CVE: CVE-2026-51538
CVSS: 9.1 (3.1) — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Severity: CRITICAL
Status: Critical advisory
Affected
_See vendor advisory_
Summary
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.
Verified Sources
References
- https://gist.github.com/MrAlaskan/8156ca3acd6754a9f66efede0a1351f2
- https://github.com/EIPStackGroup/OpENer/issues/565
- https://github.com/EIPStackGroup/OpENer/issues/565
_Validated by the Lyrie Threat Intelligence Pipeline — 3 independent sources confirmed before publication. No speculation._
Lyrie Verdict
A vulnerability of this severity is exactly what Lyrie's anti-rogue-AI defense is built for: continuous, autonomous monitoring that doesn't wait for human reaction time.
Validated sources
- [1]NVD
- [2]GitHub Advisory
- [3]MITRE