CVE-2026-124028 (GCVE-0-2026-124028)

Vulnerability from cvelistv5 – Published: 2026-11-06 19:14 – Updated: 2026-11-09 13:16
VLAI
Title
mistral.rs before 0.9.5 Tool Call Injection via mistralrs-core Output Parsers
Summary
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.
Severity
2.3 (Low)
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
4.2 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 13:16 UTC
CWE
  • CWE-140 - Improper Neutralization of Delimiters
Assigner
VulnCheck CNA
References
Impacted products
Vendor Product Version
EricLBuehler mistral.rs Affected: 0 , < 0.9.5 (semver)
Create a notification for this product.
Date Public
2026-09-25 00:00
Credits
Taehun Kim Youngjoo Shin Eric Buehler
Show details on NVD website
To clipboard 

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