Ansible Semaphore mishandles authentication

CRITICAL 9.8CVE-2023-28609 · GHSA-pmhg-cmjc-3875 · Published 18/03/2023 · updated 17/06/2026

In short

CVE-2023-28609 is a CRITICAL (CVSS 9.8) vulnerability affecting github.com/ansible-semaphore/semaphore, ansible semaphore (ansible-semaphore).
Chance of exploitation in the next 30 days (EPSS): 0.87%, higher than 59.1% of all vulnerabilities.
Fix: update to 2.8.89 or later.

Package	Affected versions	Patched versions
github.com/ansible-semaphore/semaphore Go	`< 2.8.89`	`2.8.89`
ansible semaphore ansible-semaphore	`< 2.8.89`	`2.8.89`

api/auth.go in Ansible Semaphore before 2.8.89 mishandles authentication.

NVD description

api/auth.go in Ansible Semaphore before 2.8.89 mishandles authentication.

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