High 8.8Published Aug 12, 2026

CVE-2026-73293Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision

Updated under an hour ago (2026-10-19 09:30 UTC)

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Every CVE for semaphoreui semaphore

Exploited in the last 30 days

Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.19 and from 2.19.0-alpha3 until 2.19.5-beta5, ProjectMiddleware and GetProjectOrGlobalRoleBySlug allow a project manager to use POST /api/project/{id}/roles to create a custom manager role with permission bitmask 15, overriding the built-in manager permissions and granting CanUpdateProject and CanManageProjectUsers owner capabilities. This issue is fixed in versions 2.18.19 and 2.19.5-beta5.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-269
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

semaphoreui semaphore semaphoreui:semaphore (from the name)	before 2.18.19; from 2.19.0-alpha3, < 2.19.5-beta5	CNA record

References

https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2x-refsource-confirm
https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667106a01a68x-refsource-misc
https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca73554f2c33bbx-refsource-misc
https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19x-refsource-misc
https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5x-refsource-misc

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.