Vulnerability Description
Poweradmin is a web-based DNS administration tool for PowerDNS server. Versions prior to 4.2.4 and 4.3.3 use the attacker-controlled `HTTP_HOST` request header as the authoritative source for building callback URLs in its OIDC, SAML, and logout authentication flows without any validation. An unauthenticated attacker can poison the `redirect_uri` sent to the Identity Provider, causing the IdP to redirect the victim's authorization code to an attacker-controlled server - resulting in full account takeover with no credentials required. Versions 4.2.4 and 4.3.3 patch the issue.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/poweradmin/poweradmin/releases/tag/v4.2.4
- https://github.com/poweradmin/poweradmin/releases/tag/v4.3.3
- https://github.com/poweradmin/poweradmin/security/advisories/GHSA-3735-5339-xfwx
- https://github.com/poweradmin/poweradmin/security/advisories/GHSA-3735-5339-xfwx
FAQ
What is CVE-2026-54588?
CVE-2026-54588 is a vulnerability with a CVSS score of 9.6 (CRITICAL). Poweradmin is a web-based DNS administration tool for PowerDNS server. Versions prior to 4.2.4 and 4.3.3 use the attacker-controlled `HTTP_HOST` request header as the authoritative source for building...
How severe is CVE-2026-54588?
CVE-2026-54588 has been rated CRITICAL with a CVSS base score of 9.6/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-54588?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.