CVE-2026-73293
Semaphore UI: Manager-to-owner privilege escalation via custom-role slug collision
- 8.8HighCVSS base score
- 0.57%Exploitation in 30 daysEPSS · top 52% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
Description
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
- https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 1 day later
· 1 day later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.57% · top 52% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected < 2.18.19
- affected >= 2.19.0-alpha3, < 2.19.5-beta5
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/semaphoreui/semaphoreGHSA-cxvf-gvfq-36w2 (opens in a new tab)
References
References5
- https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667106a01a68 (opens in a new tab)x_refsource_MISC
- https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca73554f2c33bb (opens in a new tab)x_refsource_MISC
- https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19 (opens in a new tab)x_refsource_MISC
- https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-57317 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-cxvf-gvfq-36w2 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-73293)Record last updated .