CVE-2026-54588

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.

Score

CVSS 3.1 9.6 Critical

Status

Deferred - security-advisories@github.com

Published

2026-06-23

Last modified

2026-06-24

Weaknesses

CWE-20, CWE-601

Affected products

• Poweradmin (Poweradmin)

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