What is CVE-2025-66286?

CVE-2025-66286 is a medium-severity vulnerability in Red Hat Enterprise Linux 6, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.7/10. Published 2026-04-23.

How severe is CVE-2025-66286?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Auth bypass in Red Hat Enterprise Linux 6

CVE-2025-66286

An API design flaw in WebKitGTK and WPE WebKit allows untrusted web content to unexpectedly perform IP connections, DNS lookups, and HTTP requests. Applications expect to use the WebPage::send-request signal handler to approve or reject al…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.000 (10.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

access.redhat.com/security/cve/CVE-2025-66286 (vdb-entry, x_refsource_REDHAT)
bugs.webkit.org/show_bug.cgi
RHBZ#2424652 (issue-tracking, x_refsource_REDHAT)

Frequently asked questions

What is CVE-2025-66286?: CVE-2025-66286 is a medium-severity vulnerability in Red Hat Enterprise Linux 6, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.7/10. Published 2026-04-23.
How severe is CVE-2025-66286?: Medium severity. CVSS v3 base score is 4.7 out of 10.