Medium 4.7Published Apr 23, 2026

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

Updated under an hour ago (Oct 26, 2026, 4:50 PM ET)

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It affects Red Hat Enterprise Linux 6. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 6

Exploited in the last 30 days

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: 4.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N
Weakness (CWE): CWE-639
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Awaiting Analysis
Record last updated: Apr 28, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux	6	CNA record

References

References

https://access.redhat.com/security/cve/CVE-2025-66286	vdb-entry, x-refsource-redhat
https://bugs.webkit.org/show_bug.cgi?id=259787
https://bugzilla.redhat.com/show_bug.cgi?id=2424652	issue-tracking, x-refsource-redhat

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.