CVE-2026-11303 Use after free in Chrome
A remote attacker can execute arbitrary code inside the sandbox via a crafted PDF file due to a use-after-free flaw in PDFium.
- 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-2026-11303?
CVE-2026-11303 is a high-severity use after free vulnerability in Google Chrome, published on 4 Jun 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
Use after free in PDFium in Google Chrome prior to 149.0.7827.53 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted PDF file. (Chromium security severity: Low)
Weakness: CWE-416
Which versions are affected by CVE-2026-11303?
It affects 1 product.
Products include Google Chrome.
How do I fix CVE-2026-11303?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-11303 being exploited?
There is no known exploitation of CVE-2026-11303 in the wild and no public exploit code.
Other vulnerabilities in Google Chrome
Sources
Also known as DEBIAN-CVE-2026-11303, ECHO-97c8-f8b8-2937, GHSA-cwjx-7rhw-fgp9, MINI-wfpp-8pq5-9w4q.