CVE-2026-83596 Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature
Processing malicious web content in WebKitGTK can cause memory corruption, potentially allowing attackers to execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-83596?
CVE-2026-83596 is a high-severity memory corruption vulnerability in Red Hat Enterprise Linux 6, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A flaw was found in WebKitGTK. Processing malicious web content can cause memory corruption due to improper memory handling.
Weakness: CWE-120
Which versions are affected by CVE-2026-83596?
How do I fix CVE-2026-83596?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-83596 being exploited?
There is no known exploitation of CVE-2026-83596 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-83596, ECHO-65f2-4d37-b120, GHSA-xxgm-wv7m-9vch, OESA-2026-3771, UBUNTU-CVE-2026-83596.