Semaphore U: OS Command Injection

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73294
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-12 16:17:22 UTC
Updated2026-08-12 17:17:32 UTC
DescriptionSemaphore 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.

Risk And Classification

Primary CVSS: v3.1 9.9 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem Types: CWE-78 | CWE-88 | CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') | CWE-88 CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED9.9CRITICALCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Semaphoreui Semaphore affected < 2.18.17 Not specified
CNA Semaphoreui Semaphore affected >= 2.19.0-alpha3, < 2.19.5-beta2 Not specified

References

ReferenceSourceLinkTags
github.com/semaphoreui/semaphore/commit/a7a7a33a64aea382a0726b3722856f29... [email protected] github.com
github.com/semaphoreui/semaphore/security/advisories/GHSA-xp7j-h7jc-4w8p 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/semaphoreui/semaphore/tree/v2.19.5-beta2 [email protected] github.com
github.com/semaphoreui/semaphore/commit/7e8a9434bd81b82cf42220151c74801e... [email protected] github.com
github.com/semaphoreui/semaphore/tree/v2.18.17 [email protected] github.com
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