CVE-2026-91994
Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | semaphoreui |
| Product | semaphore |
| Published | Sep 15, 2026 |
| Last Updated | Sep 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
semaphoreui / semaphore
0 ≤ 2.19.12
References
github.com: https://github.com/semaphoreui/semaphore/issues/4150 github.com: https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/projects/project.go#L89-L106 github.com: https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/router.go#L308-L329 github.com: https://github.com/semaphoreui/semaphore vulncheck.com: https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.12-missing-authorization-on-get-and-head-requests
Credits
🔍 George Chen