CVE-2026-122135 is a high-severity (CVSS 8.8) CWE-829 vulnerability in mistralai mistral-vibe. A fix is available — see the affected versions and patch details below.
Mistral Vibe before 3.0.3 contains a remote code execution vulnerability that allows attackers to run commands by abusing repository-configured gpg.program during project context collection.…
Description
Mistral Vibe before 3.0.3 contains a remote code execution vulnerability that allows attackers to run commands by abusing repository-configured gpg.program during project context collection. A crafted repository setting gpg.program and log.showSignature with a signed commit makes git log execute the attacker's program at session start, before any trust prompt.
Affected Products
mistral-vibemistralaiDetection & mitigation playbook
Vendor / applianceDetect
Inventory every mistralai mistral-vibe deployment and check each version against the affected-products list above.
Fix
Apply the mistralai mistral-vibe security patch or hotfix for CVE-2026-122135 on the affected version, following the vendor advisory for your exact build.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.
Frequently Asked Questions
Is CVE-2026-122135 being exploited in your environment?
Detect and block the exploit chain at execution, on systems you cannot patch yet.