CVE-2026-73682Public exploitNetwork attack vector

Authenticated code execution via upload-pack option injection

Published Aug 14, 2026 · Updated Aug 14, 2026

OS command injection in Semaphore before 2.18.17 and 2.19.0-alpha3 through 2.19.5-beta1 allows remote authenticated users to execute code. CmdGitClient.GetLastRemoteCommitHash passes an unvalidated repository git_url to git ls-remote without an option delimiter, allowing --upload-pack content to reach a shell. A Manager or Owner role on any project and the default cmd_git client are sufficient; execution occurs in the main server process with its secrets and privileges.

CVSS severity9.9
Critical
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Semaphore before 2.18.17 and 2.19.0-alpha3 through 2.19.5-beta1 allows remote authenticated users to execute code. CmdGitClient.GetLastRemoteCommitHash passes an unvalidated repository git_url to git ls-remote without an option delimiter, allowing --upload-pack content to reach a shell. A Manager or Owner role on any project and the default cmd_git client are sufficient; execution occurs in the main server process with its secrets and privileges.

The record

CVE
CVE-2026-73682
Published
Aug 14, 2026
Updated
Aug 14, 2026
Vendor
Semaphore UI
Product
Semaphore
Classifications
CWE-88, CWE-78, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <2.18.20

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Semaphore UI · Semaphoreversion=0 <2.18.20

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-88Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1059.004Unix Shell

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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