TI-2026-39423 Aliases CVE-2026-54588 GHSA-3735-5339-xfwx

Poweradmin has Host Header Injection in OIDC redirect_uri, SAML ACS/SLO URL, and Logout Redirect Construction.

MEDIUM 42CWE-20Published 2026-06-23 · Updated 2026-06-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00543 45th percentileScored 2026-11-07

Fix Fixed poweradmin (poweradmin): 4.2.4, 4.3.3poweradmin/poweradmin (Packagist): 4.2.4, 4.3.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
poweradmin	poweradmin	before 4.2.4; 4.3.0 to before 4.3.3	4.2.4, 4.3.3	Patch available	CNA
—	poweradmin/poweradmin (Packagist)	before 4.2.4	4.2.4	Patch available	GHSA-3735-5339-xfwx
—	poweradmin/poweradmin (Packagist)	4.3.0 to before 4.3.3	4.3.3	Patch available	GHSA-3735-5339-xfwx

poweradmin Vendorpoweradmin Affected before 4.2.4; 4.3.0 to before 4.3.3 Fixed in 4.2.4, 4.3.3 Patch available CNA
poweradmin/poweradmin (Packagist) Vendor— Affected before 4.2.4 Fixed in 4.2.4 Patch available GHSA-3735-5339-xfwx
poweradmin/poweradmin (Packagist) Vendor— Affected 4.3.0 to before 4.3.3 Fixed in 4.3.3 Patch available GHSA-3735-5339-xfwx

Remediation

Fix · CNA poweradmin (poweradmin) Fixed in 4.2.4, 4.3.3
Fix · GHSA-3735-5339-xfwx poweradmin/poweradmin (Packagist) Fixed in 4.2.4 Advisory →
Fix · GHSA-3735-5339-xfwx poweradmin/poweradmin (Packagist) Fixed in 4.3.3 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-54588
2026-10-03 Alias added: GHSA-3735-5339-xfwx

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-54588

Other 4

TI-2026-35197 Poweradmin: CSV Injection in log export endpoints allows formula execution in spreadsheet applications CVSS 3.1MEDIUM 6.9
TI-2021-08462 A cross-site scripting (XSS) vulnerability in Power Admin PA Server Monitor 8.2.1.1… CVSS 3.1MEDIUM 5.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences