CVE-2025-64425: Coolify has host header injection in forgot password

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-01-05 · updated 2026-10-07
Weakness: CWE-644

Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. In Coolify versions up to and including v4.0.0-beta.434, an attacker can initiate a password reset for a victim, and modify the host header of the request to a malicious value. The victim will receive a password reset email, with a link to the malicious host. If the victim clicks this link, their reset token is sent to the attacker's server, allowing the attacker to use it to change the victim's password and takeover their account. As of time of publication, it is unclear if a patch is available.

Affected products

coollabsio coolify: before 4.0.0; 4.0.0-beta100, 4.0.0-beta101, 4.0.0-beta102, 4.0.0-beta103, 4.0.0-beta104, 4.0.0-beta105 (+418) — fixed in 4.0.0

How to fix

Upgrade to a fixed version: coollabsio coolify 4.0.0. Check the vendor advisory for mitigations.

References

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