CVE-2026-91994
Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
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.
INFO
Published Date :
Sept. 15, 2026, 11:35 a.m.
Last Modified :
Sept. 15, 2026, 11:35 a.m.
Remotely Exploit :
Yes !
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2026-91994
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Apply the vendor-supplied update for Semaphore UI.
- Verify project environment access controls.
- Review user roles and permissions.
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CVE-2026-91994 vulnerability anywhere in the article.