Vulnerability details
CVE-2026-111057
mljar mercury
Mercury: Unauthenticated Remote Code Execution in /api/terminals - access control bypass
CVSS 3.1
10.0Critical
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 10.0Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| mljar | mercury | >= 3.0.0, < 3.2.4 | CVEProject cvelistV5 (CNA) |
References and advisories
3- https://github.com/mljar/mercury/commit/8c467129037ee9df269d543ac217ffd33b97bf3f x_refsource_MISC
- https://github.com/mljar/mercury/releases/tag/v3.2.4 x_refsource_MISC
- https://github.com/mljar/mercury/security/advisories/GHSA-f8c7-rwf9-fmgm x_refsource_CONFIRM
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Details
- Published
- 2026-10-19
- Last updated
- 2026-10-28
- State
- Published
- Assigner (CNA)
- GitHub_M
- Kolun priority
- 28 · Low
Exploit prediction (EPSS)
0.69%
Probability of exploitation in 30 days
53.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-185Incorrect Regular Expression
- CWE-284Improper Access Control