What is CVE-2026-54588?

CVE-2026-54588 is a critical-severity vulnerability, classified under Improper Input Validation. CVSS score: 9.6/10. Published 2026-06-23.

How severe is CVE-2026-54588?

Critical severity. CVSS v3 base score is 9.6 out of 10.

CVE-2026-54588

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 l…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:L.

Weakness classification (CWE)

CWE-20 — Improper Input Validation
CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54588?: CVE-2026-54588 is a critical-severity vulnerability, classified under Improper Input Validation. CVSS score: 9.6/10. Published 2026-06-23.
How severe is CVE-2026-54588?: Critical severity. CVSS v3 base score is 9.6 out of 10.