WebKitGTK Use-After-Free Triggered by Malicious Web Content Enables Remote Code Execution
Last refreshed2026-10-30
Status: UPDATED
| Advisory ID: CVE-2026-78376
Key Details
CVE
CVE-2026-78376
CVSS Score / Version
8.8 (High) / CVSS v3.1
Updated
2026-10-29
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 7, WebKit WebKit, and WebKitGTK WebKitGTK
Classified as
CWE-416 (Use After Free)
Exploitation prediction (EPSS)
0.29% probability of exploitation in the next 30 days (20% percentile) -- FIRST.org's EPSS model.
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 7
WebKit
WebKit
WebKitGTK
WebKitGTK
Subsystems
OT Supporting Infrastructure
Sectors
Multiple
What to Know
A flaw was found in WebKitGTK. Processing malicious web content can cause a use-after-free issue due to improper memory handling and result in memory corruption. (NVD)
What to Do
Monitor Red Hat, WebKit, and WebKitGTK's web pages for any future patch releases.