CVE-2026-73294: Semaphore UI is a web interface for managing DevOps tools

Q: How do I fix CVE-2026-73294?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Q: Is CVE-2026-73294 being exploited?

CVE-2026-73294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-73294 affect?

CVE-2026-73294 affects affected software. Severity is critical (CVSS 9.9). 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/{

Q: How urgent is CVE-2026-73294?

Priority 50/100. Critical severity; CISA SSVC: public proof of concept

This month

CRITICAL 9.9

CVE-2026-73294 is a critical-severity flaw (CVSS 9.9) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
CISA SSVC: public proof of concept

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 49%)
CISA exploited list	No
Weakness	CWE-78, CWE-88
Published	2026-08-12
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-12 16:17 UTCPublished CVE record published
2026-10-24 15:10 UTCUpdated Record last modified

Exact fixes by distribution

Go · github.com/semaphoreui/semaphore · FIXED · 0.0.0-20260704181911-7e8a9434bd81 · vulnerable: < 0.0.0-20260704181911-7e8a9434bd81 · source

go get github.com/semaphoreui/semaphore@v0.0.0-20260704181911-7e8a9434bd81 go list -m github.com/semaphoreui/semaphore

Fedora 46 · clementine · FIXED · 1.4.2-1.fc46 · FEDORA-2026-3e748ef4d3 · source

sudo dnf upgrade --advisory=FEDORA-2026-3e748ef4d3

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-73294?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-73294 being exploited?

CVE-2026-73294 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-73294 affect?

CVE-2026-73294 affects affected software. Severity is critical (CVSS 9.9). 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/{

How urgent is CVE-2026-73294?

Priority 50/100. Critical severity; CISA SSVC: public proof of concept

Software pages

Git vulnerabilities

References

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