# CVE-2026-91994

## Summary

- **CVE ID:** CVE-2026-91994
- **Severity:** HIGH
- **CVSS Score:** 7.1 (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)
- **CWE:** CWE-862
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## Description

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.

## Affected Products

- semaphoreui — semaphore (0)

## References

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

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.30%
- **EPSS Percentile:** 23.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._