CVE-2026-124028

LOW
INFO Priority: 0.00 BB Relevance: 45/100
Published: 2026-11-06 Modified: 2026-11-09 First seen: 2026-11-06 Status: active

Attack Surface

Network No Auth

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: Passive
S: X
AT: Present
VC: Low
VI: Low
VA: None

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.

Affected Software (2)

VendorProductVersion
EricLBuehler mistral.rs 0 < 0.9.5
EricLBuehler mistral.rs 0 < 0.9.5

Bug Bounty Relevance

45 / 100
✓ Network accessible
✓ No authentication

CVSS Score

2.3 / 10.0 v4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.19%
Raw Score 0.001890
Percentile 8.6%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00189
2026-11-12
0.00189
2026-11-10
0.00189
2026-11-09
0.00189
2026-11-08
0.00189
2026-11-07
0.00189

Intelligence Sources

mitre ref →
nvd ref →