What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 4.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-23 · updated 2026-10-14
• Weakness: CWE-639

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.

Affected products

• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

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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