anonhaven

CVE-2026-73293

HIGH CVSS 3.1: 8.8 EPSS 0.40%
Updated Aug 12, 2026
Semaphore
Parameter Value
CVSS 8.8 (HIGH)
Type CWE-269 (Improper Privilege Management)
Vendor Semaphore
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Weakness Type (CWE)

CWE-269 Improper Privilege Management

References 5

https://github.com/semaphoreui/semaphore/commit/1c4bb65df114962134f8829d4a03667…
security-advisories@github.com
https://github.com/semaphoreui/semaphore/commit/bb2a4e1f08c8023e618f8dd6eaca735…
security-advisories@github.com
https://github.com/semaphoreui/semaphore/releases/tag/v2.18.19
security-advisories@github.com
https://github.com/semaphoreui/semaphore/releases/tag/v2.19.5-beta5
security-advisories@github.com
https://github.com/semaphoreui/semaphore/security/advisories/GHSA-cxvf-gvfq-36w2
security-advisories@github.com
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