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CVE-2025-66286

Webkitgtk: authorization bypass through webpage::send-request signal handler

Published: Apr 23, 2026Updated: Apr 23, 2026 Sources: CVE List NVD
NVD MITRE
4.7CVSS
MEDIUM

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:CC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None

Weaknesses

CWE-639

Affected Products

Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2025-66286
access.redhat.com
https://bugs.webkit.org/show_bug.cgi?id=259787
bugs.webkit.org
https://bugzilla.redhat.com/show_bug.cgi?id=2424652
bugzilla.redhat.com

Timeline

Published
Apr 23, 2026
Last Updated
Apr 23, 2026

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