CVE-2026-4721

CVE-2026-4721 refers to memory-safety bugs in Firefox/Thunderbird across Firefox ESR 115.33, ESR 140.8, and Firefox/Thunderbird 148. Some flaws show memory corruption and could be exploitable for arbitrary code with enough effort per the initial entry. The issues were fixed in Firefox 149, Firefo...

CVE-2026-8968

Denial-of-service in the Audio/Video: Web Codecs component of Firefox caused by an invalid pointer. Affected product: Firefox WebCodecs; root cause: invalid pointer in the WebCodecs code path. Impact (per CVSS 3.1): HIGH with Availability impact; Attack Vector: NETWORK; Attack Complexity: LOW; Pr...

CVE-2026-8971

The CVE-2026-8971 issue is described across multiple sources as a same-origin policy bypass in the Networking: JAR component, with remediation issued as Firefox 151. The documents do not specify the exact affected product versions beyond Firefox, nor any exploits or in-the-wild use. Root cause de...

CVE-2026-9309

CVE-2026-9309 affects Firefox for iOS Reader View. The issue is improper escaping of HTML tags in JSON-LD metadata, enabling a malicious page to inject markup that leaks sensitive URL parameters and could lead to arbitrary JavaScript execution in an internal origin. Impact is described as access ...

CVE-2025-10530

CVE-2025-10530 describes a spoofing vulnerability in the WebAuthn component of Firefox for Android. Affected products and versions: Firefox < 143 and Thunderbird

CVE-2025-11717

CVE-2025-11717 affects Mozilla Firefox versions earlier than 144. The issue occurs when switching between Android apps via the card carousel, causing a black screen for the card image if a password-related screen was the last used; before 144, the password edit screen was visible. Practical impac...

CVE-2026-0883

CVE-2026-0883 corresponds to information disclosure in the Networking component affecting Mozilla Firefox versions below 147 (and Firefox ESR below 140.7) and Mozilla Thunderbird versions below 147 (and Thunderbird ESR below 140.7). The linked advisories and Debian advisories list this CVE among ...

CVE-2026-12307

CVE-2026-12307 is a memory-safety vulnerability in Mozilla Firefox and Thunderbird that was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12. Reports from multiple feeds (NVD, Debian, Fedora, OSV) confirm a single fixed public CU for Firefox/Thunderbird. The Debia...

CVE-2026-16395

CVE-2026-16395 : Integer overflow in the Audio/Video component of Firefox. root cause: integer overflow within the media handling path. Impact per sources: high confidentiality, integrity, and availability should be considered given the CVSS vector indicates network attack vector with no user int...

CVE-2026-16401

Vulnerability CVE-2026-16401 is a privilege-escalation issue in the Data Loss Prevention component affecting Firefox and Thunderbird. The flaw, classified as high impact (CVSSv3.1: 8.8, CONF/I/H/A), is mitigated by upgrading to Firefox 153 and Thunderbird 153. The CVSS vector indicates network at...

CVE-2026-2764

CVE-2026-2764: JIT miscompilation, use-after-free in the JavaScript Engine: JIT component. Affected products include Firefox/Firefox ESR (pre-148 and ESR

CVE-2026-2805

CVE-2026-2805 describes an Invalid pointer in the DOM: Core & HTML component affecting Mozilla Firefox and Mozilla Thunderbird. The issue originates from a pointer problem in the DOM Core & HTML, with the vulnerability fixed in version Firefox 148 and Thunderbird 148 . Public CVSS details (CVSS v...

CVE-2026-4704

Denial-of-service in the WebRTC: Signaling component (CVE-2026-4704) affects Firefox/Firefox ESR and Thunderbird prior to fixed versions. Multiple documents confirm the issue and indicate fixes in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9. The vulnerability is associa...

CVE-2026-4705

CVE-2026-4705 is an undefined-behavior issue in the WebRTC: Signaling component. Public disclosures in the initial document indicate the vulnerability affected Firefox and Thunderbird products, with patches delivered in Firefox 149 / ESR 140.9 and Thunderbird 149 / 140.9. The accompanying connect...

CVE-2026-4716

CVE-2026-4716 is a boundary-condition and uninitialized-memory issue in the JavaScript Engine. Connected advisories associate it with Firefox/Thunderbird, stating it affects Firefox < 149 and Firefox ESR

CVE-2026-4720

CVE-2026-4720 is a memory-safety issue affecting Mozilla products (Firefox/Thunderbird). Connected advisories confirm memory-corruption-type bugs in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148, and Thunderbird 148, with the practical impact stated as potential arbitrary code execution. ...

CVE-2025-11153

CVE-2025-11153 describes a JIT miscompilation in the JavaScript Engine (JIT component) of Mozilla Firefox . The vulnerability affects Firefox versions earlier than 143.0.3 . The reported impact is a partial escalation path with remote/network exposure and high partial impact on integrity , per CV...

CVE-2025-11710

CVE-2025-11710 is reported across Mozilla products (Firefox and Thunderbird). A compromised web process could abuse malicious IPC messages to cause a privileged browser process to leak memory blocks to the compromised process. Affected: Firefox <144, Firefox ESR <115.29 and <140.4, Thund...

CVE-2025-13016

CVE-2025-13016 is a Mozilla Firefox/Firefox ESR JavaScript: WebAssembly component boundary-condition vulnerability. Connected advisories confirm the flaw affects Firefox <145 and ESR

CVE-2025-14325

CVE-2025-14325 is a JIT miscompilation in the JavaScript Engine’s JIT component affecting Firefox < 146 and Firefox ESR

CVE-2025-14860

CVE-2025-14860 is a use-after-free vulnerability in Mozilla Firefox’s Disability Access APIs component, affecting Firefox versions earlier than 146.0.1. The available documents consistently identify the root cause as a use-after-free problem in Disability Access APIs, leading to either denial of ...

CVE-2025-55029

CVE-2025-55029 affects Mozilla Firefox for iOS prior to version 142. The issue allows malicious scripts to bypass the popup blocker and spam new tabs, potentially leading to a denial-of-service condition. Root cause is exploitation of popup-blocking bypass in Firefox for iOS; median impact is ava...

CVE-2026-0890

The CVE-2026-0890 entry describes a spoofing issue in the DOM: Copy & Paste and Drag & Drop component affecting Mozilla products. Affected products/components: Firefox (versions before 147) and Firefox ESR (before 140.7); Thunderbird (before 147) and Thunderbird (before 140.7). Root cause and imp...

CVE-2026-16380

CVE-2026-16380 describes a mitigation bypass in the Networking component of Mozilla Firefox. The issue is characterized in the sources as a bypass vulnerability that was fixed in Firefox 153. The affected product is Mozilla Firefox; detailed root cause and affected subcomponents are not explicitl...

CVE-2026-2793

CVE-2026-2793 is a memory-safety issue in Mozilla products (Firefox/Thunderbird) affecting Firefox ESR 115.32, ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. The advisory notes evidence of memory corruption and that, with enough effort, arbitrary code could potentially be exec...

CVE-2026-2794

CVE-2026-2794: Information disclosure due to uninitialized memory in Firefox and Firefox Focus for Android. Affected: Firefox/Firefox Focus for Android; root cause is uninitialized memory. Status: fixed in Firefox 148.0. Remediation: upgrade to Firefox 148 or later (per Mozilla advisory). Practic...

CVE-2026-4722

CVE-2026-4722 describes a privilege escalation in the IPC component affecting Firefox

CVE-2026-8951

The CVE-2026-8951 entry describes a Spoofing issue in the Toolbar component of Firefox for Android. The connected documents consistently identify the affected software as Firefox for Android and state the vulnerability was fixed in Firefox 151. There are no explicit technical details about the ro...

CVE-2025-11708

CVE-2025-11708 is a use-after-free in MediaTrackGraphImpl::GetInstance() affecting Firefox before version 144, Firefox ESR before 140.4, Thunderbird before 144, and Thunderbird before 140.4. Connected advisories corroborate multiple vendors and distributions addressing these Firefox/Thunderbird m...

CVE-2025-11714

CVE-2025-11714 is a memory-safety vulnerability in Mozilla Firefox/Thunderbird stack, affecting Firefox and Thunderbird releases older than 144 (and Firefox ESR releases older than 115.29/140.4; Thunderbird ESR releases older than 140.4). The connected documents confirm the issue as memory-corrup...

CVE-2025-54144

Summary: CVE-2025-54144 affects Firefox for iOS before version 141. The URL scheme used to facilitate searching of text queries could be abused to open arbitrary website URLs or internal pages if a user is tricked into clicking a link. This is described as a security bypass in Firefox for iOS pri...

CVE-2026-0881

CVE-2026-0881 describes a sandbox escape in the Messaging System component affecting Mozilla Firefox and Mozilla Thunderbird before version 147. The root cause is a vulnerability in the Messaging System that can lead to arbitrary code execution with total impact (confidentiality, integrity, and a...

CVE-2026-12301

CVE-2026-12301 is a memory-safety vulnerability that is fixed in Firefox 152 and Thunderbird 152. The Connected sources consistently describe the issue as a memory-safety bug resolved by upgrading to Firefox 152/Thunderbird 152; no exploitation details are provided in the documents. Affected comp...

CVE-2026-12302

CVE-2026-12302 is a mitigation bypass in the DOM: Security component that has been fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12. Multiple advisories and vendor notes confirm the patch exists in these versions. Affected products in the conne...

CVE-2026-12303

CVE-2026-12303 concerns information disclosure due to incorrect boundary conditions in the Graphics: WebGPU component. The vulnerability affects Firefox and Thunderbird and is fixed in Firefox 152 and Thunderbird 152. Root cause: boundary condition handling in WebGPU. Impact is information disclo...

CVE-2026-12323

CVE-2026-12323 describes a spoofing issue in the DOM: Core & HTML component. The vulnerability affected Mozilla Firefox and Thunderbird and was fixed in Firefox 152 and Thunderbird 152. The available references confirm the DOM spoofing flaw and its patch in version 152. Practical impact is modest...

CVE-2026-16353

The CVE-2026-16353 entry concerns Mozilla Firefox/Firefox ESR and the DOM Bindings (WebIDL) component. Affected component: Invalid pointer in the DOM: Bindings (WebIDL). Root cause: invalid pointer handling in the DOM Bindings. Impact: high confidentiality, integrity, and availability (per CVSS 3...

CVE-2026-16374

The CVE-2026-16374 entry concerns information disclosure in the Framework component of Firefox DevTools. Affected product: Mozilla Firefox (DevTools Framework). Root cause/impact: information disclosure; CVSS_BASE score 7.5 (HIGH) with network access and no user interaction. Mitigation: upgrade t...

CVE-2026-16406

CVE-2026-16406: A mitigation bypass in the Networking component was reported for Firefox; the vulnerability is addressed by Firefox 153. The available sources do not specify the exact root cause, affected subcomponents, or exploitation details beyond the fix version. CVSSv3.1 metrics are provided...

CVE-2026-2776

CVE-2026-2776 involves a sandbox escape due to incorrect boundary conditions in the Telemetry component of External Software. Impacted products are Mozilla Firefox (including Firefox 148 and ESR releases 115.33 and 140.8) and Thunderbird (both 148 and 140.8). The underlying issue is a boundary-co...

CVE-2026-2803

CVE-2026-2803 affects Mozilla Firefox and Mozilla Thunderbird. The issue is an information disclosure with mitigation bypass in the Settings UI component, fixed in Firefox 148 and Thunderbird 148. Connected advisories confirm affected products and versions, and note remediation to update to the l...

CVE-2026-4693

CVE-2026-4693: Affects Firefox < 149, Firefox ESR < 115.34, and Firefox ESR

CVE-2026-4729

CVE-2026-4729 affects Firefox 148 and Thunderbird 148, with memory-safety bugs that could lead to memory corruption and potential arbitrary-code execution. The issues were fixed in Firefox 149 and Thunderbird 149. Mitigation: upgrade to the fixed versions (Firefox 149 / Thunderbird 149). Exploita...

CVE-2026-74939

Mozilla Firefox's DOM: Navigation component contains a privilege escalation flaw (CVSS 8.8 HIGH). Exploitation requires a network-based attacker to lure a user into visiting a crafted page. Affected versions must be upgraded to Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, or Firefox ESR 1...

CVE-2026-74941

Mozilla Firefox's CanvasWebGL graphics component allows privilege escalation. Fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. CVSS 8.8 (HIGH) with network attack vector requiring user interaction. No exploitation reported in the wild; users should update to the patched versions. ...

CVE-2026-74956

Firefox and Thunderbird's DOM: Service Workers component has a same-origin policy bypass allowing cross-origin data access and manipulation. CVSS 9.1 (critical). Fixed in Firefox 154, ESR 153.1, Thunderbird 154, and 153.1. No exploitation reported in provided documents. Debian/Ubuntu users withou...

CVE-2025-13020

CVE-2025-13020 is a use-after-free vulnerability in the WebRTC: Audio/Video component of Mozilla Firefox/Thunderbird. Affected: Firefox <145, Firefox ESR <140.5, Thunderbird

CVE-2025-13022

CVE-2025-13022 is a boundary-condition flaw in the Graphics: WebGPU component that affects Firefox and Thunderbird, both prior to version 145. Root cause: incorrect boundary handling in WebGPU. Impact: high-severity potential for crashes or arbitrary code execution per the CVSS data. Affected pro...

CVE-2025-14330

CVE-2025-14330 describes a JIT miscompilation bug in the JavaScript Engine's JIT component. Affected: Firefox < 146, Firefox ESR < 140.6, Thunderbird < 146, Thunderbird ESR

CVE-2025-54143

CVE-2025-54143 is tied to Firefox for iOS prior to version 141. The issue arises from sandboxed iframes on web pages that could bypass the parent page’s sandbox restrictions, potentially allowing downloads to the device. Affected product: Firefox for iOS