CVE-2026-73294Public exploitNetwork attack vectorHinoki check available

Authenticated command execution via Git option injection

Published Aug 12, 2026 · Updated Aug 12, 2026

OS command injection in Semaphore allows remote authenticated users to execute arbitrary commands through a crafted repository URL. The repository GitURL reaches git ls-remote as an unvalidated positional argument, so a leading --upload-pack option makes Git invoke attacker-supplied shell text. A project Manager or Owner can trigger execution in the main server process on a default cmd_git installation, exposing its accessible secrets and host privileges.

CVSS severity9.9
Critical
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

OS command injection in Semaphore allows remote authenticated users to execute arbitrary commands through a crafted repository URL. The repository GitURL reaches git ls-remote as an unvalidated positional argument, so a leading --upload-pack option makes Git invoke attacker-supplied shell text. A project Manager or Owner can trigger execution in the main server process on a default cmd_git installation, exposing its accessible secrets and host privileges.

The record

CVE
CVE-2026-73294
Published
Aug 12, 2026
Updated
Aug 12, 2026
Vendor
Semaphore UI
Product
Semaphore
Classifications
CWE-78, CWE-88, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.18.17
  2. Affected versionversion=>= 2.19.0-alpha3, < 2.19.5-beta2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Semaphore UI · Semaphoreversion=< 2.18.17; version=>= 2.19.0-alpha3, < 2.19.5-beta2

Published CVSS scores

9.9GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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