CVE-2026-124028
MEDIUM
NVD
CVSS Score
4.2
Severity
MEDIUM
Published
Nov 06, 2026
Vendor
unknown
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.
References
- https://github.com/EricLBuehler/mistral.rs
- https://github.com/EricLBuehler/mistral.rs/commit/b43d3443e946752c0f662c2df42a2974410c9532
- https://github.com/EricLBuehler/mistral.rs/pull/2455
- https://github.com/EricLBuehler/mistral.rs/releases/tag/v0.9.5
- https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w