Firefox vulnerabilities
230 known CVE vulnerabilities in Firefox, translated and rated.
- CVE-2026-12298Medium
A memory safety bug was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. This vulnerability could potentially allow remote code execution or data leakage.
- CVE-2026-12291High
A use-after-free vulnerability was found in the Networking: HTTP component of Firefox and Thunderbird. It was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
- CVE-2026-12290High
A memory safety bug was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. This vulnerability could allow remote code execution or data leakage.
- CVE-2026-10702Medium
JIT miscompilation in the JavaScript Engine of Firefox. This vulnerability was fixed in version 151.0.3.
- CVE-2026-10701High
Incorrect boundary conditions in the Graphics: Text component in Firefox. This vulnerability was fixed in Firefox 151.0.3.
- CVE-2026-8975High
Memory safety bugs were present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150, which could allow remote code execution. The vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8974High
Memory safety bugs present in Firefox ESR 140.10 and Firefox 150 could lead to memory corruption and potentially allow arbitrary code execution. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8973High
Memory safety bugs present in Firefox 150 showed evidence of memory corruption and could potentially be exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
- CVE-2026-8972High
Privilege escalation vulnerability in the WebRTC: Audio/Video component in Firefox and Thunderbird. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
- CVE-2026-8970High
Privilege escalation vulnerability in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8969High
In Firefox and Thunderbird 151, a mitigation bypass vulnerability in the DOM: Security component was fixed. An attacker could bypass security measures.
- CVE-2026-8968High
A denial-of-service vulnerability due to an invalid pointer in the Audio/Video: Web Codecs component. Fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8967High
Information disclosure vulnerability in the Graphics: WebGPU component in Firefox and Thunderbird. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
- CVE-2026-8966High
Information disclosure vulnerability in the IP Protection component in Firefox and Thunderbird. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
- CVE-2026-8965High
An information disclosure vulnerability exists in the DOM: Security component of Firefox and Thunderbird. This flaw was fixed in Firefox 151 and Thunderbird 151.
- CVE-2026-8963High
Spoofing vulnerability in the Web Speech component of Firefox and Thunderbird. Fixed in version 151.
- CVE-2026-8962High
A vulnerability in the DOM: Security component of Firefox and Thunderbird. The issue was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8961Medium
A Spoofing vulnerability in the Form Autofill component of Firefox and Thunderbird. The issue was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8947High
Use-after-free vulnerability in the DOM: Bindings (WebIDL) component of Firefox and Thunderbird. The flaw was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
- CVE-2026-8945High
A sandbox escape vulnerability in Firefox and Firefox Focus for Android. This flaw was fixed in Firefox 151.
- CVE-2026-8390High
A use-after-free vulnerability was found in the JavaScript: WebAssembly component of Firefox. This flaw was fixed in Firefox 150.0.3.
- CVE-2026-8389High
A JIT miscompilation vulnerability exists in the JavaScript Engine of Firefox, which could lead to unexpected behavior. This issue was fixed in Firefox 150.0.3.
- CVE-2026-8388Medium
A vulnerability in the JavaScript Engine: JIT component of Firefox and Thunderbird is caused by incorrect boundary conditions. The flaw was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.
- CVE-2026-8093High
Memory safety bugs were present in Firefox 150.0.1, showing evidence of memory corruption. With enough effort, some could have been exploited to run arbitrary code. The vulnerability was fixed in Firefox 150.0.2 and Thunderbird 150.0.2.
- CVE-2026-8092High
Memory safety bugs were found in Firefox ESR 115.35.1, Firefox ESR 140.10.1, and Firefox 150.0.1. Some of these bugs showed evidence of memory corruption, which could potentially be exploited to run arbitrary code.
- CVE-2026-8090High
A use-after-free vulnerability was found in the DOM: Networking component of Firefox and Thunderbird. The flaw was fixed in Firefox 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
- CVE-2026-7320High
An information disclosure vulnerability in the Audio/Video component of Firefox and Thunderbird due to incorrect boundary conditions. The flaw is fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
- CVE-2026-6786High
Memory safety bugs were found in Firefox ESR 140.9, Firefox 149, Thunderbird ESR 140.9, and Thunderbird 149. Some of these bugs showed evidence of memory corruption and could potentially be exploited to run arbitrary code with enough effort.
- CVE-2026-6785High
Memory safety bugs were found in Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird ESR 140.9, Firefox 149, and Thunderbird 149. Some of these bugs showed evidence of memory corruption and could potentially be exploited to run arbitrary code. The vulnerabilities were fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6784High
Memory safety bugs were found in Firefox 149 and Thunderbird 149. Some of these bugs showed evidence of memory corruption, potentially allowing arbitrary code execution. The vulnerability was fixed in Firefox 150 and Thunderbird 150.
- CVE-2026-6754High
A use-after-free vulnerability was found in the JavaScript Engine component of Firefox and Thunderbird. It is fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6751High
An uninitialized memory vulnerability was found in the Audio/Video: Web Codecs component of Firefox and Thunderbird. The flaw was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6749High
Information disclosure vulnerability in the Graphics: Canvas2D component due to uninitialized memory. Fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-6746High
Use-after-free vulnerability in the DOM: Core & HTML component of Firefox and Thunderbird. The flaw was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
- CVE-2026-5733High
A vulnerability in the Graphics: WebGPU component of Firefox and Thunderbird due to incorrect boundary conditions. The flaw was fixed in versions 149.0.2 of both products.
- CVE-2026-5732High
Incorrect boundary conditions and integer overflow were found in the Graphics: Text component of Firefox and Thunderbird. This vulnerability was fixed in Firefox 149.0.2, Firefox ESR 140.9.1, Thunderbird 149.0.2, and Thunderbird 140.9.1.
- CVE-2026-4699High
A vulnerability in the Layout: Text and Fonts component of Firefox and Thunderbird due to incorrect boundary conditions. The flaw was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-4697High
A vulnerability in the Audio/Video: Web Codecs component of Firefox and Thunderbird is caused by incorrect boundary conditions. The flaw was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-4695High
A vulnerability in the Audio/Video: Web Codecs component of Firefox and Thunderbird is caused by incorrect boundary conditions. This flaw could lead to unexpected behavior or potential exploitation by an attacker.
- CVE-2026-4694High
Incorrect boundary conditions and integer overflow were found in the Graphics component of Firefox and Thunderbird. The vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-4693High
A vulnerability in the Audio/Video playback component of Firefox and Thunderbird is caused by incorrect boundary conditions. The flaw was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-4687High
A sandbox escape vulnerability exists in the Telemetry component due to incorrect boundary conditions. This flaw was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-4686High
A vulnerability in the Graphics: Canvas2D component of Firefox and Thunderbird is caused by incorrect boundary conditions. This flaw may lead to unspecified security consequences.
- CVE-2026-4685High
A vulnerability in the Graphics: Canvas2D component of Firefox and Thunderbird is caused by incorrect boundary conditions. The flaw has been fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
- CVE-2026-2798High
A use-after-free vulnerability was found in the DOM: Core & HTML component of Firefox and Thunderbird. The flaw was fixed in versions 148 of both applications.
- CVE-2026-2794High
An information disclosure vulnerability due to uninitialized memory in Firefox and Firefox Focus for Android. This flaw was fixed in Firefox 148.
- CVE-2026-24869High
Use-after-free vulnerability in the Layout: Scrolling and Overflow component of Firefox. This flaw was fixed in Firefox 147.0.2.
- CVE-2026-0891High
Memory safety bugs were found in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146, and Thunderbird 146. Some of these bugs showed evidence of memory corruption and could potentially be exploited to run arbitrary code with sufficient effort.
- CVE-2026-0882High
A use-after-free vulnerability was found in the IPC component of Firefox and Thunderbird. It is fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
- CVE-2026-0880High
An integer overflow in the Graphics component of Firefox and Thunderbird allows a sandbox escape. The vulnerability is fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

