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TI-2026-71973 Aliases CVE-2026-109428GHSA-66p3-rgrf-xjf3

Permission bypass in Mistral Vibe via bash line continuation

Priority MEDIUM 40CWE-436Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Mistral Vibe before 2.25.5 has a permission validation bypass caused by a parsing mismatch between tree-sitter-bash and bash (CWE-436). The permission check reads backslash-newline line continuations differently than bash does, so a crafted command can hide an unauthorized command behind an allowlisted prefix such as cd. A remote attacker can run arbitrary commands when a user interacts with the product.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

Mistral Vibe before 2.25.5 contains a permission validation bypass vulnerability that allows attackers to execute unauthorized commands by exploiting a parsing discrepancy between tree-sitter-bash and bash in handling backslash-newline line continuations in the _extract_commands() function of bash.py. Attackers can craft a command string where tree-sitter-bash extracts only an allowlisted prefix such as cd while bash joins the line continuation into a materially different and hidden command such as a curl request, causing resolve_permission to grant ALWAYS permission while bash executes unauthorized arbitrary commands.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00509 43rd percentileScored 2026-11-07
Fix Fixed mistral-vibe (mistralai): 2.25.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
mistralaimistral-vibebefore 2.25.52.25.5Patch availableCNA
  • mistral-vibe Vendormistralai Affected before 2.25.5 Fixed in 2.25.5 Patch available CNA

Remediation

Upgrade Mistral Vibe to version 2.25.5, which fixes the flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

  • Fix · CNA mistral-vibe (mistralai) Fixed in 2.25.5

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-109428
  2. 2026-10-13 Alias added: GHSA-66p3-rgrf-xjf3
  3. 2026-10-14 Priority changed: MEDIUM → LOW
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-26 Priority changed: LOW → MEDIUM

References

Patch 2

Other 1

  • TI-2026-81009 Remote code execution in Mistral Vibe via Git filter drivers CVSS 4.0HIGH 8.7
  • TI-2026-63252 Mistral Vibe before 2.25.5 Remote Code Execution via git post-checkout CVSS 4.0HIGH 8.6
  • TI-2026-60017 An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass… CVSS 4.0CRITICAL 10.0
  • TI-2026-60016 An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass… CVSS 4.0CRITICAL 10.0
  • TI-2026-60015 An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass… CVSS 4.0CRITICAL 10.0
  • TI-2026-60018 Incorrect permission assignment in mistralai mistral-vibe CVSS 4.0CRITICAL 10.0
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences