Mozilla Firefox security vulnerabilities

A security vulnerability exists in Mozilla Firefox versions prior to 159, Firefox ESR versions prior to 115.44, Firefox ESR versions prior to 153.6, Thunderbird versions prior to 159, and Thunderbird versions prior to 153.6. This vulnerability stems from post-free reuse in the JIT component of th...

PT-2026-126474

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 159 Firefox ESR versions prior to 115.44 Firefox ESR versions prior to 153.6 Thunderbird versions prior to 159 Thunderbird versions prior to 153.6 Description A use-after-free issue exists within the JIT Just-In-Time...

PT-2026-126481

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 159 Firefox ESR versions prior to 153.6 Thunderbird versions prior to 159 Thunderbird ESR versions prior to 153.6 Description A use-after-free issue exists in the JIT Just-In-Time component of the JavaScript Engine...

PT-2026-126525

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 159 Firefox ESR versions prior to 115.44 Firefox ESR versions prior to 153.6 Thunderbird versions prior to 159 Thunderbird versions prior to 153.6 Description Incorrect boundary conditions exist within the JIT...

PT-2026-126596

Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159...

Mozilla Firefox security vulnerabilities

A security vulnerability exists in Mozilla Firefox versions prior to 159, Firefox ESR versions prior to 153.6, Thunderbird versions prior to 159, and Thunderbird versions prior to 153.6. This vulnerability stems from a JIT compilation error in the JIT component of the JavaScript engine...

PT-2026-126552

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 159 Firefox ESR versions prior to 153.6 Thunderbird versions prior to 159 Thunderbird ESR versions prior to 153.6 Description An invalid pointer issue exists within the JIT Just-In-Time component of the JavaScript...

PT-2026-126565

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 159 Firefox ESR versions prior to 153.6 Thunderbird versions prior to 159 Thunderbird ESR versions prior to 153.6 Description An invalid pointer issue exists within the JIT Just-In-Time component of the JavaScript...

firefox: Use-after-free in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine: JIT component...

firefox: JIT miscompilation in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component...

firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the JavaScript Engine: JIT component...

firefox: JIT miscompilation in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component...

firefox: Use-after-free in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine: JIT component...

firefox: JIT miscompilation in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component...

firefox: JIT miscompilation in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component...

firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the JavaScript Engine: JIT component...

firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Incorrect boundary conditions in the JavaScript Engine: JIT component...

firefox: JIT miscompilation in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: JIT miscompilation in the JavaScript Engine: JIT component...

firefox: Use-after-free in the JavaScript Engine: JIT component

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: Use-after-free in the JavaScript Engine: JIT component...

Linux Distros Unpatched Vulnerability : CVE-2026-109721

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and...