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

[ Why it matters ]Priority signals

• Critical severity: CVSS 10.0

[ Description ]Official description

Mercury is a Python framework for sharing Jupyter notebooks as web applications and dashboards. From 3.0.0 until 3.2.4, a missing comma in BLOCKED_PATTERNS concatenates the /lab and /api/terminals regular-expression literals. Requests to /api/terminals therefore bypass the anonymous endpoint blocklist and reach Jupyter Server's terminal API. An unauthenticated attacker can use the resulting interactive operating-system shell to execute commands and access data available to the Mercury process. This issue is fixed in version 3.2.4.

[ Fixes ]Fixes and patches

• mercury 3.2.4Fixed version · GitHub Advisories · pip package mercury: upgrade to 3.2.4 or later (affected >= 3.0.0, <= 3.2.3)

[ Packages ]Affected open-source packages

• mercury pipAffected >= 3.0.0, <= 3.2.3 · fixed in 3.2.4 · GHSA-f8c7-rwf9-fmgm

[ References ]References

• 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