GHSA-cxvf-gvfq-36w2: github.com/semaphoreui/semaphore (CVE-2026-73293)

Package	Ecosystem	Affected	Fixed in
github.com/semaphoreui/semaphore	Go	<0.0.0-20260705182501-bb2a4e1f08c8	0.0.0-20260705182501-bb2a4e1f08c8

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Semaphore (github.com/semaphoreui/semaphore) versions before 0.0.0-20260705182501-bb2a4e1f08c8 are affected. A project member with the built-in manager role can create a custom project role with the slug "manager" and full permissions, which then gives that member owner-level permissions on the project. The attack needs only an authenticated manager account and one request, and it lets the attacker change project settings, manage members, or delete the project. Upgrade to 0.0.0-20260705182501-bb2a4e1f08c8 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.8	High	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0057, the 47th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:13 UTC First seen by agentprime
31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.