CVE-2026-6766

CVE-2026-6766 affects NSS Libraries component. The issue is incorrect boundary conditions in NSS, with fixes landed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. Affected platforms include Firefox/Thunderbird releases; remediation is upgrading to the indicated versi...

CVE-2026-8093

CVE-2026-8093 concerns memory-safety bugs in Firefox 150.0.1. The gathered records describe memory corruption clues and state that, with sufficient effort, some flaws could have allowed arbitrary code execution. Mozilla's advisory confirms the issue was fixed in Firefox 150.0.2. Affected software...

CVE-2026-6769

CVE-2026-6769 is a privilege-escalation issue in the Firefox/Thunderbird Debugger component. The Initial Description states a fix in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. Connected advisories (ALAS2FIREFOX-2026-058, ALSA-2026:19348, ALSA-2026:10757, Debian DLA/...

CVE-2012-3956

CVE-2012-3956 is a use-after-free in MediaStreamGraphThreadRunnable::Run in Mozilla Firefox before 15.0 (and similar affected versions for Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0/ESR 10.x before 10.0.7, SeaMonkey before 2.12). Successful exploitation could allow remote attackers t...

CVE-2012-5838

CVE-2012-5838 affects the WebGL copyTexImage2D in Mozilla Firefox (<17.0), Thunderbird (<17.0), and SeaMonkey (

CVE-2012-5839

CVE-2012-5839 is a heap-based buffer overflow in Mozilla's gfxShapedWord::CompressedGlyph::IsClusterStart that affects Firefox and related Mozilla components. Affected software includes Mozilla Firefox before 17.0 (and ESR 10.x before 10.0.11), Thunderbird before 17.0 (and ESR 10.x before 10.0.11...

CVE-2025-8029

CVE-2025-8029: Thunderbird and Firefox products are affected by a vulnerability where javascript: URLs are executed when used inside object and embed tags. The impact list states affected versions include Firefox < 141 and Thunderbird < 141 (and ESR branches

CVE-2025-8031

CVE-2025-8031 concerns a vulnerability where the username:password portion is not correctly stripped from URLs in CSP reports, potentially leaking HTTP Basic Authentication credentials. The CVE’s context across connected documents shows affected software including Firefox and Thunderbird variants...

CVE-2025-8037

CVE-2025-8037 affects Mozilla Firefox (and Thunderbird) browsers when a nameless cookie value contains an equals sign, shadowing other cookies. Affected: Firefox <141, Firefox ESR <140.1, Thunderbird <141, Thunderbird

CVE-2025-9181

CVE-2025-9181: Uninitialized memory in the JavaScript Engine is confirmed in connected documents affecting Firefox and Thunderbird branches prior to version 142 (and ESR branches prior to 128.14, 140.2 for ESR). The issue is a memory-safety bug in the JS engine; no exploitation details are provid...

CVE-2026-16356

CVE-2026-16356 describes a sandbox-escape use-after-free flaw in Mozilla Firefox’s Disability Access APIs component. The NVD entry notes this vulnerability affects Firefox desktop products and was fixed in Firefox 153, Firefox ESR 115.38, and Firefox ESR 140.13. The consolidated feeds (NVD, Debia...

CVE-2026-6773

The vulnerability CVE-2026-6773 is a denial-of-service caused by an integer overflow in the Graphics: WebGPU component. Affected products identified in the provided sources include Firefox and Thunderbird; the issue was fixed in Firefox 150 and Thunderbird 150. The CVE’s impact is documented as h...

CVE-2026-6777

CVE-2026-6777 is a general description of an issue in the Networking: DNS component, without explicit exploitation details. The connected advisories indicate a fix in Firefox 150 and Thunderbird 150, and Fedora advisories recommend updating NSS to 3.122.1 along with Firefox to 150.0. The ENISA/EU...

CVE-2008-4061

CVE-2008-4061: An integer overflow in the MathML component of Mozilla Firefox can be triggered by an mtd element with a large rowspan value. Affects Firefox before 2.0.0.17 and 3.x before 3.0.2, Thunderbird before 2.0.0.17, and SeaMonkey before 1.1.12. Impact: remote memory corruption, denial of ...

CVE-2013-0771

CVE-2013-0771 describes a heap-based buffer overflow in Mozilla Firefox’s gfxTextRun::ShrinkToLigatureBoundaries, affecting Firefox before 18.0 (and ESR 17.x before 17.0.1), Thunderbird before 17.0.2 (and ESR 17.x before 17.0.1), and SeaMonkey before 2.15. Successful exploitation via a crafted do...

CVE-2025-1942

The CVE-2025-1942 vulnerability affects Mozilla Firefox (<136) and Mozilla Thunderbird (

CVE-2026-12294

CVE-2026-12294 concerns a Sandbox escape in the DOM: Workers component found in Mozilla products. The vulnerability affects Firefox (including Firefox 152 and ESR branches 140.12 and 115.37) and Thunderbird (152 and 140.12). The underlying issue is a sandbox escape in the Workers component, with ...

CVE-2012-4215

CVE-2012-4215 is a use-after-free in Mozilla Firefox’s nsPlaintextEditor::FireClipboardEvent that could allow remote code execution or a heap memory corruption, affecting Firefox before 17.0, Firefox ESR before 10.0.11, Thunderbird before 17.0, Thunderbird ESR before 10.0.11, and SeaMonkey before...

CVE-2012-5835

CVE-2012-5835 describes an integer overflow in the WebGL subsystem of Mozilla Firefox prior to 17.0 (also affecting Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0 and Thunderbird ESR 10.x before 10.0.11, and SeaMonkey before 2.14). The overflow can lead to remote code execution or a den...

CVE-2025-4084

CVE-2025-4084 concerns Firefox products. The issue arises from insufficient escaping of special characters in the copy as cURL feature, which could mislead users into running a crafted command and potentially enable local code execution on Windows. Affected software includes Firefox for Windows, ...

CVE-2025-5262

CVE-2025-5262: A double-free in vpx_codec_enc_init_multi after a failed allocation during WebRTC encoder initialization can cause memory corruption and a potentially exploitable crash. Affected: Thunderbird < 139 and Thunderbird

CVE-2026-2796

CVE-2026-2796 describes a JIT miscompilation in the JavaScript: WebAssembly component that affects Firefox and Thunderbird prior to version 148. The root cause is a JIT miscompilation in the WebAssembly pathway within the JavaScript engine, leading to a high-severity impact (as reflected by the C...

CVE-2008-4058

CVE-2008-4058 affects Mozilla-based products (Firefox, SeaMonkey, Thunderbird) where XPConnect could be abused to pollute XPCNativeWrappers via chrome XBL/chrome JS, enabling remote arbitrary-code execution with chrome privileges. Publicly documented affected ranges include Firefox before 2.0.0.1...

CVE-2012-4196

CVE-2012-4196 affects Mozilla Firefox (and related Mozilla components) where a prototype property-injection attack on the Location object (window.location) bypassed Same Origin Policy. Affected are Firefox prior to 16.0.2, Firefox ESR 10.x prior to 10.0.10, Thunderbird prior to 16.0.2, Thunderbir...

CVE-2026-16375

CVE-2026-16375 affects Mozilla Firefox’s Networking: HTTP component with a site isolation issue. The vulnerability was fixed in Firefox 153 and Firefox ESR 140.13. Affected product: Firefox (Networking: HTTP) with site isolation as the underlying bug. According to the provided documents, the CVSS...

CVE-2008-4062

Summary: CVE-2008-4062 covers multiple /unspecified / vulnerabilities in Mozilla Firefox (before 2.0.0.17 and 3.x before 3.0.2), Thunderbird (before 2.0.0.17), and SeaMonkey (before 1.1.12). The flaws involve the JavaScript engine and are triggered by vectors related to (1) misinterpretation of N...

CVE-2012-4184

CVE-2012-4184 affects Mozilla's COW in Firefox (and related Mozilla products) prior to version 16.0 (Firefox), ESR 10.x prior to 10.0.8, Thunderbird prior to 16.0, Thunderbird ESR 10.x prior to 10.0.8, and SeaMonkey prior to 2.13. The issue allows a crafted web site to bypass restrictions and acc...

CVE-2026-6784

CVE-2026-6784 covers memory safety bugs in Mozilla Firefox 149 and Thunderbird 149 that could lead to memory corruption and, with sufficient effort, potentially arbitrary code execution. The vulnerability is evidenced across multiple feeds and is mitigated by upgrading to Firefox 150 and Thunderb...

CVE-2012-4193

CVE-2012-4193 affects Mozilla Firefox and related Mozilla products (Firefox before 16.0.1, Firefox ESR before 10.0.9, Thunderbird before 16.0.1, Thunderbird ESR before 10.0.9, SeaMonkey before 2.13.1). Root cause: a security check in the defaultValue unwrapping of security wrappers is omitted, al...

CVE-2025-8039

The CVE-2025-8039 entry concerns a vulnerability where search terms persist in the URL bar after navigating away from a search page. Affected software and versions are Mozilla Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird

CVE-2025-9182

CVE-2025-9182 denotes a denial-of-service caused by an out-of-memory condition in the Graphics: WebRender component. Affected products include Firefox < 142, Firefox ESR < 140.2, Thunderbird < 142, and Thunderbird

CVE-2026-16365

CVE-2026-16365 affects the DOM: Workers component. The vulnerability is fixed in Firefox 153 and Thunderbird 153. The available data include a CVSS v3.1 base score of 8.8 (HIGH) with network attack vector, low attack complexity, no privileges required, user interaction required, and total impact ...

CVE-2026-6754

CVE-2026-6754 is a memory-safety issue (Use-after-free) in the JavaScript Engine component that was fixed in Firefox 150 and related ESR branches, as well as Thunderbird 150/140.x lines. Public advisories confirm the flaw in the JavaScript engine leads to a potentially exploitable memory corrupti...

CVE-2008-4065

CVE-2008-4065 affects Mozilla Firefox (≤2.0.0.16, and ≤3.0.1/3.0.x before 3.0.2), Thunderbird (≤2.0.0.16), and SeaMonkey (≤1.1.11) with a BOM-based stripping issue that can bypass cross‑site scripting (XSS) protections. The root cause is removal of Stripped BOM characters from JavaScript code pri...

CVE-2026-16377

Mitigation bypass in Firefox’s PDF Viewer component (CVE-2026-16377) is confirmed. The vulnerability was fixed in Firefox 153 and Firefox ESR 140.13. According to the sources, the CVSSv3.1 base score is 9.8 (CRITICAL) with network attack vector, low complexity, and no user interaction required, a...

CVE-2026-16383

CVE-2026-16383 is a mitigation bypass in the DOM: Networking component. It affects Firefox (including ESR) and Thunderbird where the issue was addressed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13. The root cause is described as a DOM mitigation bypass within the N...

CVE-2009-1840

CVE-2009-1840 affects Mozilla Firefox (before 3.0.11), Thunderbird and SeaMonkey, where content policy checks were not performed before loading a script file into a XUL document. This allowed a crafted HTML document (e.g., via a web bug in email or a web page/ad) to bypass intended access restric...

CVE-2026-16351

CVE-2026-16351 is a sandbox escape caused by a use-after-free in the DOM: Navigation component. It affected Mozilla Firefox and Firefox ESR prior to 115.38, with fixes in Firefox 153 and ESR 115.38/140.13. Affected products include Firefox ESR versions older than 115.38 (per multiple feeds), and ...

CVE-2006-6499

The CVE-2006-6499 entry concerns Mozilla Firefox 2.x before 2.0.0.1, Firefox 1.5.x before 1.5.0.9, Thunderbird before 1.5.0.9, and SeaMonkey before 1.0.7. The vulnerability is a memory overwrite that occurs when floating-point precision is reduced, rather than exiting safely. This can allow remot...

CVE-2012-3963

CVE-2012-3963 is a Use-after-free in Mozilla Firefox's js::gc::MapAllocToTraceKind that can allow remote code execution. Affected: Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, SeaMonkey before 2.12. Mitigation: upgrade to Firefo...

CVE-2026-16390

CVE-2026-16390 describes a mitigation bypass in the Firefox Enterprise Policies component. The vulnerability is indicated as fixed in Firefox 153 and Firefox ESR 140.13. The initial entry provides a CVSS 3.1 base score of 9.1 (CRITICAL) with network attack vector, low attack complexity, and no us...

CVE-2012-4183

CVE-2012-4183 is a use-after-free in DOMSVGTests::GetRequiredFeatures affecting Firefox before 16.0, Firefox ESR before 10.0.8, Thunderbird before 16.0, and SeaMonkey before 2.13, with potential for remote code execution or a denial of service via heap memory corruption. Connected advisories from...

CVE-2012-5843

CVE-2012-5843 affects Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14. The vulnerability is described as unspecified memory safety hazards in the browser engine that could lead to memory corruption and a crash (DoS) or, potentially, arbitrary code execution via unk...

CVE-2026-12293

CVE-2026-12293 is a use-after-free in the Graphics: WebGPU component. The flaw is fixed in Firefox 152 and Thunderbird 152. Sources from NVD/Mozilla advisories confirm the issue and the patch versions; exploit details are not provided in the supplied documents. The vulnerability is classified wit...

CVE-2026-16391

Information disclosure in Firefox’s Storage: IndexedDB component (CVE-2026-16391) is addressed in Firefox 153 and Firefox ESR 140.13. The CVSSv3.1 vector indicates an unaltered scope, network attack vector, high confidentiality impact with no impact to integrity/availability, and no user interact...

CVE-2026-2783

CVE-2026-2783 is a JIT miscompilation information-disclosure vulnerability in the JavaScript Engine (JIT component) that affects Firefox and Thunderbird products. Public details in connected advisories state the issue arises from JIT miscompilation, enabling information disclosure, and indicate f...

CVE-2006-1531

CVE-2006-1531 concerns an unspecified vulnerability in Firefox and Thunderbird prior to 1.5.0.2 and SeaMonkey prior to 1.0.1 that could allow a remote attacker to cause a denial of service (crash) and possibly execute arbitrary code via unknown DHTML-related attack vectors. Public vendor details ...

CVE-2008-4068

CVE-2008-4068 is a directory-traversal vulnerability in Mozilla Firefox (pre-2.0.0.17 and 3.x pre-3.0.2), Thunderbird (pre-2.0.0.17), and SeaMonkey (pre-1.1.12) triggered by crafted resource: URIs. The flaw lets remote attackers bypass local HTML restrictions, read sensitive information, and prom...

CVE-2012-4179

CVE-2012-4179 is a use-after-free in Mozilla Firefox's nsHTMLCSSUtils::CreateCSSPropertyTxn that can lead to code execution or heap memory corruption. Affected are Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunderbird ESR 10.x before 10.0.8, and SeaMonkey befor...

CVE-2013-0784

CVE-2013-0784 is one of multiple memory-safety vulnerabilities affecting Mozilla Firefox, Thunderbird, and SeaMonkey. The connected advisories (Ubuntu USN-1729-2 and related GLSA/Nessus entries) document memory corruption risks that could lead to denial of service or potentially arbitrary code ex...