Semaphore UI: CSRF vulnerability on password change endpoint - No CSRF token or password confirmation

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.6 · CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L

EPSS

• CVE-2026-73292: 0.23% estimated exploitation activity in the next 30 days; percentile 14.12 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary The password change form is vulnerable to CSRF, allowing an attacker to change a user password (even the administrator) by tricking a connected user to visit a malicious website. The vulnerability has been tested with version 2.18.20. Details The password change endpoint of Semaphore UI does not implement any CSRF protection: - No CSRF token required - No current password confirmation required - Authentication relies solely on a session cookie (semaphore) with no SameSite enforcement A malicious page can silently change the password of any authenticated user who visits it by submitting the /api/users/<id/password forms. PoC To reproduce the exploit, you can use the following python script: Example : 1 - Run the previous script with the url of the targeted semaphore instance and the id of the targeted user. The script will serve a malicious webpage on port 1337. 2 - Connect to semaphore UI in another tab with the targeted user. 3 - In the same browser, visit the malicious…

Published by the source

3 Sep 2026, 19:23 UTC

Last modified by the source

10 Sep 2026, 15:15 UTC

Source last checked

26 Oct 2026, 15:29 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-8cj9-r88m-8945

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GO-2026-6370

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-8cj9-r88m-8945

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# Patch Next advisory brief: CVE-2026-73292

Advisory: Semaphore UI: CSRF vulnerability on password change endpoint - No CSRF token or password confirmation
IDs: CVE-2026-73292, GHSA-8cj9-r88m-8945
Record: https://patchnext.com/advisories/cve-2026-73292 (revision 3, source checked 26 Oct 2026, 15:29 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: github.com/semaphoreui/semaphore 0.0.0-20260707190631-c59c3dc9035b. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go github.com/semaphoreui/semaphore: affected < 0.0.0-20260707190631-c59c3dc9035b; fixed in 0.0.0-20260707190631-c59c3dc9035b

## Suggested inspection (read-only)
- Go github.com/semaphoreui/semaphore: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on github.com/semaphoreui/semaphore.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8cj9-r88m-8945 (OSV record GHSA-8cj9-r88m-8945 lists affected ranges: Go github.com/semaphoreui/semaphore >=0 <0.0.0-20260707190631-c59c3dc9035b (fixed))
- Verified: https://osv.dev/vulnerability/GO-2026-6370 (OSV record GO-2026-6370 lists affected ranges: Go github.com/semaphoreui/semaphore >=0 <0.0.0-20260707190631-c59c3dc9035b (fixed))
- Verified: https://github.com/advisories/GHSA-8cj9-r88m-8945 (GitHub-reviewed advisory GHSA-8cj9-r88m-8945 lists affected ranges: Go github.com/semaphoreui/semaphore >=0 <0.0.0-20260707190631-c59c3dc9035b)

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