Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-91994
semaphoreui semaphore — Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N L N H N N 7.1 .0042 33.5 —
AFFECTED
Product Versions Fixed
semaphore unspecified —
TIMELINE
Sep 15 Reserved by VulnCheck
Sep 15 Published (CNA: VulnCheck)
Sep 24 EXPLOIT PUBLISHED — CVE-2026-91994 (semaphoreui semaphore). Public exploit reference added.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| September 15, 2026 | Reserved | Reserved by VulnCheck |
| September 15, 2026 | Published | Published (CNA: VulnCheck) |
| September 24, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-91994 (semaphoreui semaphore). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| semaphoreui | semaphore | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-91994 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
