CVE-2026-111057: Mercury: Unauthenticated Remote Code Execution in /api/terminals - access control bypass

October 19, 2026

A missing comma in mercury_app/block_handler.py’s BLOCKED_PATTERNS list causes the blocklist to fail to cover the /api/terminals endpoint. As a result, any unauthenticated attacker can spawn a full, interactive OS-level shell on the host running Mercury.

References

github.com/advisories/GHSA-f8c7-rwf9-fmgm
github.com/mljar/mercury/commit/8c467129037ee9df269d543ac217ffd33b97bf3f
github.com/mljar/mercury/releases/tag/v3.2.4
github.com/mljar/mercury/security/advisories/GHSA-f8c7-rwf9-fmgm
nvd.nist.gov/vuln/detail/CVE-2026-111057

Code Behaviors & Features

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