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.
{
"cwe_ids": [
"CWE-20",
"CWE-601"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54588.json"
}{
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "4.2.4"
},
{
"introduced": "4.3.0"
},
{
"fixed": "4.3.3"
}
],
"source": [
"AFFECTED_FIELD",
"REFERENCES"
]
}