CVE-2026-124028lowCWE-140

CVE-2026-124028: low-severity vulnerability in EricLBuehler mistral.rs

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

Published

Follow this CVE+ Monitor mistral.rs

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

5Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 2.3
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.
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
Affected products
EricLBuehler · mistral.rs
Related CVEs — EricLBuehler mistral.rs

In the same product, most dangerous first.

CVE-2026-108939MEDIUMEricLBuehler mistral.rs media_source.rs is_global_ip server-side request forgeryEPSS 0.5%CVE-2026-108759HIGHmistral.rs 0.9.0 through 0.9.4 Sandbox Escape via Symlink Following in mistralrs-code-execEPSS 0.3%