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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-111057
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-19 16:17:03 UTC
Updated2026-10-19 21:14:14 UTC
DescriptionMercury 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.

Risk And Classification

Primary CVSS: v3.1 10 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Problem Types: CWE-185 | CWE-284 | CWE-185 CWE-185: Incorrect Regular Expression | CWE-284 CWE-284: Improper Access Control

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Mljar Mercury affected >= 3.0.0, < 3.2.4 Not specified

References

ReferenceSourceLinkTags
github.com/mljar/mercury/commit/8c467129037ee9df269d543ac217ffd33b97bf3f [email protected] github.com
github.com/mljar/mercury/releases/tag/v3.2.4 [email protected] github.com
github.com/mljar/mercury/security/advisories/GHSA-f8c7-rwf9-fmgm [email protected] github.com
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