CVE-2025-11153 JIT miscompilation in the JavaScript Engine: JIT component

What is CVE-2025-11153?

CVE-2025-11153 is a high-severity code injection vulnerability in Mozilla Firefox, published on 30 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 143.0.3.

Weakness: CWE-94

Which versions are affected by CVE-2025-11153?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2025-11153?

Upgrade to a fixed version.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2025-11153 being exploited?

There is no known exploitation of CVE-2025-11153 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7cgj-mr4w-j8w6, UBUNTU-CVE-2025-11153.