{"id":"CVE-2026-124028","published":"2026-11-06T20:17:21.310","lastModified":"2026-11-09T14:17:14.343","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.","cvssScore":4.2,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","cwes":["CWE-140"],"vendors":[],"products":[],"references":[{"url":"https://github.com/EricLBuehler/mistral.rs","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/commit/b43d3443e946752c0f662c2df42a2974410c9532","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/pull/2455","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/releases/tag/v0.9.5","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w","tags":[]},{"url":"https://www.vulncheck.com/advisories/mistral-rs-before-0.9.5-tool-call-injection-via-mistralrs-core-output-parsers","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w","tags":[]}],"exploitRefs":[{"url":"https://github.com/EricLBuehler/mistral.rs","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/commit/b43d3443e946752c0f662c2df42a2974410c9532","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/pull/2455","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/releases/tag/v0.9.5","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w","tags":[]},{"url":"https://github.com/EricLBuehler/mistral.rs/security/advisories/GHSA-34w8-j94f-8c5w","tags":[]}],"hasPoc":true,"ai":null}