---
title: "CVE-2026-111057: Mercury - Command Injection"
description: "Mercury 3.0.0 to 3.2.4 contains a command injection caused by a missing comma in BLOCKED_PATTERNS concatenating regex literals, letting unauthenticated attackers execute commands via Jupyter Server's terminal API, exploit requires no authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-111057/
---

# CVE-2026-111057 Mercury - Command Injection

Mercury 3.0.0 to 3.2.4 contains a command injection caused by a missing comma in BLOCKED\_PATTERNS concatenating regex literals, letting unauthenticated attackers execute commands via Jupyter Server's terminal API, exploit requires no authentication.

CVSS base score 10.0 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111057)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

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

Published

19 October 2026

Updated

20 October 2026

Weakness

[CWE-185](https://cwe.mitre.org/data/definitions/185.html)

## Vendor fix

Update to version 3.2.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

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

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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