How severe is CVE-2026-87985?

CVE-2026-87985 has a CVSS 4.0 base score of 10.0, rated critical severity.

Is CVE-2026-87985 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-87985?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-87985 published?

CVE-2026-87985 was published on 2026-09-11.

CVE-2026-87985

CVE-2026-87985 is a critical-severity vulnerability with a CVSS 4.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-184.

Key facts

Severity: Critical (CVSS 4.0 base score 10.0)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-184
Published: 2026-09-11
Last modified: 2026-09-11

Description

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using ANSI-C quoted arguments. These arguments are not properly inspected, enabling a crafted allowlisted command to execute arbitrary code on the user's system without approval.

Frequently asked questions

What is CVE-2026-87985?: An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using ANSI-C quoted arguments. These arguments are not properly inspected, enabling a crafted allowlisted command to execute arbitrary code on the user's system without approval.
How severe is CVE-2026-87985?: CVE-2026-87985 has a CVSS 4.0 base score of 10.0, rated critical severity.
Is CVE-2026-87985 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-87985?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-87985 published?: CVE-2026-87985 was published on 2026-09-11.

References

https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe3

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