Vulnerability record · CVE-2026-91994 · published 15 September 2026

CVE-2026-91994: Missing authorization vulnerability

Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment endpoint.

7.1 CVSS 4.0 High EPSS 0.42% · top 66.7% CWE-862 · Missing authorization Awaiting Analysis

7.1CVSS 4.0 base score

0.42%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

5References

24 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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:

References

Link	Tags
https://github.com/semaphoreui/semaphore
https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/projects/project.go#L89-L106
https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/router.go#L308-L329
https://github.com/semaphoreui/semaphore/issues/4150
https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.12-missing-authorization-on-get-and-head-requests

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Source: NIST National Vulnerability Database (record CVE-2026-91994), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.