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Advisories

mistral.rs before 0.9.5 Tool Call Injection via mistralrs-core Output Parsers

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Severity
low
Date
Affecting

  • mistral.rs >= 0, < 0.9.5

CWE
  • CWE-140 Improper Neutralization of Delimiters
CVSS
2.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Credit
Taehun Kim, Youngjoo Shin, Eric Buehler
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.

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