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VulnerabilityPublished

CVE-2026-73292: semaphoreui semaphore · Cross-Site Request Forgery (CSRF)

Affects semaphoreui semaphoreSource CVE Database V5

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Not known to be exploited · CVSS 8.3 High : upgrade to 2.18.21 soon.

Data as of 8 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.3High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.18.21
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Upgrade semaphore and semaphoreui/semaphore to 2.18.21.

Affected software

ProductAffectedFixed in
semaphoreuisemaphoreAffected
  • <2.18.21
Fixed in
  • 2.18.21
GitHubsemaphoreui/semaphorepkg:github/semaphoreui/semaphoreOther threatsAffected
  • <2.18.21
Fixed in
  • 2.18.21

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Semaphore UI to version 2.18.21 or later, where this CSRF vulnerability is fixed. No other mitigations are specified. Patch status is not explicitly stated in vendor advisories but the description confirms the issue is fixed in 2.18.21.

Description

Semaphore UI is a web interface for managing DevOps tools. Prior to 2.18.21, the /api/users/{id}/password endpoint accepts a cross-site request using the authenticated user's semaphore session cookie without CSRF protection or current-password confirmation, allowing an unauthenticated attacker to change an administrator's or another user's password after user interaction. This issue is fixed in version 2.18.21.

References

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