Vulnerability-Lookup

CVE-2026-73294 (GCVE-0-2026-73294)

Vulnerability from cvelistv5 – Published: 2026-08-12 15:55 – Updated: 2026-08-12 16:03

Title

Semaphore U: OS Command Injection

Summary

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.

Severity

9.9 (Critical)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-12 16:03 UTC

CWE

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')

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/semaphoreui/semaphore/security…	x_refsource_CONFIRM
https://github.com/semaphoreui/semaphore/commit/7…	x_refsource_MISC
https://github.com/semaphoreui/semaphore/commit/a…	x_refsource_MISC
https://github.com/semaphoreui/semaphore/tree/v2.18.17	x_refsource_MISC
https://github.com/semaphoreui/semaphore/tree/v2.…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
semaphoreui	semaphore	Affected: < 2.18.17 Affected: >= 2.19.0-alpha3, < 2.19.5-beta2

Show details on NVD website

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-73294 (GCVE-0-2026-73294)

Tags

Sightings

Nomenclature