CVE-2026-87983An arbitrary file read vulnerability in Mistral Vibe, introduced in version 2.6.0, allows an attacker to bypass workspace restrictions…

9.2CriticalCVSS base score
0.62%Exploitation in 30 daysEPSS · top 50% of all CVEs
NoKnown exploitednot in CISA's KEV catalog
NonePublic exploitsnone known yet

Description

An arbitrary file read vulnerability in Mistral Vibe, introduced in version 2.6.0, allows an attacker to bypass workspace restrictions using quoted absolute paths in allowlisted shell commands. Improper handling of quotation marks during path validation enables files outside the active workspace to be read without user approval.

Timeline

2026
9 Sept 2026
9 Sept 2026
ID reserved
By HiddenLayer
11 Sept 20262 days later
11 Sept 2026· 2 days later
Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-87983, by who scored it
Scored by	CVSS	Score	Vector
HiddenLayerCNA (assigner)	4.0	Critical9.2	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
NVDNVD · Deferred	4.0	Critical9.2	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/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 in 30 days): 0.62% · top 50% of all CVEs (14 Nov 2026)
CISA SSVC: Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.2.

Affected products

mistralai · mistral-vibe
- affected 2.6.0 – ≤ *

References1

https://www.hiddenlayer.com/sai-security-advisory/2026-09-mistral-vibe (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

[![CVE-2026-87983](https://cveledger.app/badge/CVE-2026-87983.svg)](https://cveledger.app/cve/CVE-2026-87983)

Record last updated 11 Sept 2026, 14:57 UTC.