CVE-2026-73294CWE-78CWE-88command-injection

CVE-2026-73294

Critical · published August 12, 2026

CVSS v3.1
9.9
EPSS
1%
Percentile
50.5
In the wild
Unconfirmed
What it is

Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.17 and 2.19.5-beta2, repository git_url handling passes an attacker-controlled --upload-pack option to CmdGitClient.GetLastRemoteCommitHash through POST /api/project/{id}/repositories and scheduled commit-hash polling, allowing a project Manager or Owner to execute arbitrary OS commands in the Semaphore server process. This issue is fixed in versions 2.18.17 and 2.19.5-beta2.

The record
Technical detail
CVSS v3.1
9.9 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00650 · 50.5th percentile
Weaknesses
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection'); CWE-88 · Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Published
2026-08-12T20:17Z
References (6)
https://github.com/semaphoreui/semaphore/commit/7e8a9434bd81b82cf42220151c74801ea97542d6 · [email protected]https://github.com/semaphoreui/semaphore/commit/a7a7a33a64aea382a0726b3722856f298663eacf · [email protected]https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p · [email protected]https://github.com/semaphoreui/semaphore/tree/v2.18.17 · [email protected]https://github.com/semaphoreui/semaphore/tree/v2.19.5-beta2 · [email protected]https://github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 12 AUG 15:55Z
    Semaphore U: OS Command Injection
    cvelistv5