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

CVSS 3.1

4.7CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 14% of CVEs (scores of 2026-10-25)

CWE

CWE-639

Published

2026-04-23

Modified

2026-10-14

Record from

the NVD, synced 2026-10-19

References

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

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