CVE-2026-124028

MediumCVSS 4.2/10Last modified Nov 9, 2026

Description

mistral.rs before 0.9.5 contains a delimiter injection vulnerability in mistralrs-core that allows attackers to inject tool calls by placing delimiter strings in text the model quotes. Attackers controlling documents, web pages or tool outputs can embed tags like </tool_call> to make qwen-xml, gemma4 or reasoning parsers return extra calls to declared tools with attacker-chosen arguments.

Metrics

CVSS 3.1 4.2/10CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-140

Affected software

No affected versions have been published.

Timeline

Published: Nov 6, 2026
Last modified: Nov 9, 2026
NVD status: Deferred

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