critical9.6
CVE-2026-54588
Poweradmin has Host Header Injection in OIDC redirect_uri, SAML ACS/SLO URL, and Logout Redirect Construction.
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | poweradmin/poweradmin | < 4.2.4 | 4.2.4 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-3735-5339-xfwx
- https://github.com/poweradmin/poweradmin/security/advisories/GHSA-3735-5339-xfwx
- https://nvd.nist.gov/vuln/detail/CVE-2026-54588
- https://github.com/poweradmin/poweradmin/releases/tag/v4.2.4
- https://github.com/poweradmin/poweradmin/releases/tag/v4.3.3