Account takeover via spoofed password-reset host
Published Jul 7, 2026 · Updated Jul 7, 2026
Host header injection in Coolify before 4.0.0-beta.471 allows remote attackers to steal reset tokens and take over accounts. TrustProxies accepts X-Forwarded-Host from every source, TrustHosts never reaches validation because of circular cache logic, and ResetPassword builds the URL from that request-controlled host. Exploitation requires the header to survive the proxy path and a victim to click the poisoned email link; the captured token permits the attacker to reset that account's password.
Summary
What happened
Host header injection in Coolify before 4.0.0-beta.471 allows remote attackers to steal reset tokens and take over accounts. TrustProxies accepts X-Forwarded-Host from every source, TrustHosts never reaches validation because of circular cache logic, and ResetPassword builds the URL from that request-controlled host. Exploitation requires the header to survive the proxy path and a victim to click the poisoned email link; the captured token permits the attacker to reset that account's password.
The record
- CVE
- CVE-2026-34198
- Published
- Jul 7, 2026
- Updated
- Jul 7, 2026
- Vendor
- coolLabs
- Product
- Coolify
- Classifications
- CWE-640, CWE-346, T1078
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 7, 2026CVE publishedPublication date reported by the CVE source.
- Jul 7, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 4.0.0-beta.471
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Coolify password-reset link poisoning proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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