CVE-2026-91994Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
semaphoreui semaphore semaphoreui:semaphore (from the name) | through 2.19.12 | CNA record |
References
- https://github.com/semaphoreui/semaphore/issues/4150issue-tracking, exploit
- https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/projects/project.go#L89-L106technical-description
- https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/router.go#L308-L329technical-description
- https://github.com/semaphoreui/semaphoreproduct
- https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.12-missing-authorization-on-get-and-head-requeststhird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.