Skip to main content

WebKitGTK and WPE WebKit CVE-2025-66286

| EUVDEUVD-2025-209565 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-04-23 redhat GHSA-qx86-g93j-m25r
4.7
CVSS 3.1 · NVD
Share

Severity by source

NVD PRIMARY
4.7 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
SUSE
MEDIUM
qualitative
Red Hat
4.7 MEDIUM
qualitative

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

5
Patch released
Apr 27, 2026 - 20:30 nvd
Patch available
Analysis Generated
Apr 23, 2026 - 13:15 vuln.today
EUVD ID Assigned
Apr 23, 2026 - 12:45 euvd
EUVD-2025-209565
Analysis Generated
Apr 23, 2026 - 12:45 vuln.today
CVE Published
Apr 23, 2026 - 12:33 nvd
MEDIUM 4.7

DescriptionCVE.org

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.

AnalysisAI

WebKitGTK and WPE WebKit contain an API design flaw that allows untrusted web content to bypass the WebPage::send-request signal handler and perform unapproved network operations including IP connections, DNS lookups, and HTTP requests. The vulnerability affects applications across Red Hat Enterprise Linux 6-9 that rely on this signal to control network access. A remote attacker can trigger these bypassed requests via crafted web content with only user interaction (UI:R), resulting in limited confidentiality impact (C:L) without code execution.

Technical ContextAI

WebKitGTK and WPE WebKit are rendering engines used in many Linux-based applications. They expose a WebPage::send-request signal handler that applications use to implement network request filtering-a critical security boundary for controlling what external resources an application may access. The vulnerability stems from a CWE-639 (Authorization Bypass Through User-Controlled Key) flaw where certain categories of HTTP requests are designed to bypass this authorization check. The specific request types that circumvent the signal handler are not detailed in available references, but the flaw appears architectural rather than a simple implementation bug. This affects all WebKitGTK and WPE WebKit releases across Red Hat Enterprise Linux versions 6, 7, 8, and 9 that include the vulnerable code path.

RemediationAI

Apply security updates from Red Hat for all affected RHEL versions (6, 7, 8, 9). Users should install patched WebKitGTK and WPE WebKit packages via their distribution's package manager (yum, dnf, or apt depending on RHEL variant). Exact patched version numbers should be confirmed from https://access.redhat.com/security/cve/CVE-2025-66286 and https://bugzilla.redhat.com/show_bug.cgi?id=2424652. For applications using WebKitGTK or WPE WebKit, no workaround exists at the application level because the vulnerability is in the underlying library; patching the library is mandatory. As a temporary mitigation, restrict access to untrusted web content or disable web browsing features in affected applications until patches are applied, but this is not a substitute for patching.

CVE-2026-18663 MEDIUM
5.9 Aug 12

Heap corruption via double-free in 389-ds-base's LDAP control parsing allows an unauthenticated remote attacker to crash

CVE-2026-4480 CRITICAL POC
9.0 May 26

Remote code execution in Samba's printing subsystem allows remote attackers to inject arbitrary shell commands via craft

CVE-2026-59090 CRITICAL
9.9 Aug 10

Arbitrary code execution in GIMP's PSD import plugin allows an attacker to run code in the context of the user who opens

CVE-2026-18922 CRITICAL
9.8 Sep 07

Authentication bypass in 389 Directory Server (shipped as Red Hat Directory Server 11-13 and within RHEL 6-10) lets remo

CVE-2026-14544 CRITICAL
9.8 Jul 03

Remote code execution and privilege escalation in HPLIP (HP Linux Imaging and Printing) affects the hpcups print filter

CVE-2026-76578 CRITICAL
9.8 Sep 07

Unauthenticated privilege escalation in FreeIPA (Red Hat Identity Management) allows a remote attacker to gain genuine a

CVE-2026-5121 HIGH
7.5 Mar 30

Remote code execution in libarchive on 32-bit systems allows unauthenticated attackers to execute arbitrary code via spe

CVE-2026-33845 CRITICAL
9.1 Apr 30

Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an intege

CVE-2026-16526 HIGH
8.8 Jul 30

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe

CVE-2026-11610 HIGH
8.8 Jul 07

Denial of service in Red Hat / 389 Directory Server (389-ds-base, versions since ~1.3.2/2013) allows an authenticated LD

CVE-2026-14474 HIGH
8.8 Jul 07

Local-to-domain-wide root privilege escalation in SSSD's LDAP sudo provider allows an authenticated LDAP directory user

CVE-2026-52720 HIGH
8.8 Jun 15

Heap buffer overflow in GStreamer's librfb (RFB/VNC client) allows a malicious VNC server to corrupt heap memory on a co

Vendor StatusVendor

SUSE

Severity: Medium
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7 Fixed
SUSE Linux Enterprise Module for Basesystem 15 SP7 Fixed
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Fixed
SUSE Linux Enterprise Module for Development Tools 15 SP7 Fixed

Share

CVE-2025-66286 vulnerability details – vuln.today

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy