CVE-2025-66286: Webkitgtk: authorization bypass through webpage::send-request signal handler

Description

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 all network requests. However, certain types of HTTP requests bypass this signal handler.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

Required

Confidentiality

Low

Integrity

None

Availability

None

Scope

Changed

Exploitation

Is it being used?

Exploit prediction (EPSS)0.2% · higher than 14% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

RH

Red Hat Enterprise Linux 6 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 7 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 8 · Red Hat

All versions, or not specified · source: vendor

RH

Red Hat Enterprise Linux 9 · Red Hat

All versions, or not specified · source: vendor