CVE-2012-1958

CVE-2012-1958 is a use-after-free vulnerability in Mozilla Firefox’s nsGlobalWindow::PageHidden path that could allow remote code execution. The vulnerability affects Firefox 4.x–13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0–13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2...

CVE-2012-3959

CVE-2012-3959 describes a use-after-free in Mozilla Firefox’s nsRangeUpdater::SelAdjDeleteNode, affecting Firefox before 15.0, Firefox ESR 10.x before 10.0.7, Thunderbird before 15.0, Thunderbird ESR 10.x before 10.0.7, and SeaMonkey before 2.12. The vulnerability allows remote attackers to execu...

CVE-2012-4201

CVE-2012-4201 is a concrete Firefox/XULRunner/Thunderbird/SeaMonkey vulnerability: the evalInSandbox path mishandles the context when processing JavaScript that sets location.href, enabling remote XSS or read access to arbitrary files via a sandboxed add-on. Affected software includes Mozilla Fir...

CVE-2017-5403

CVE-2017-5403 affects Mozilla Firefox and Thunderbird prior to version 52.0 (Firefox <52, Thunderbird

CVE-2017-5416

CVE-2017-5416 is a null dereference crash in HttpChannel caused by premature release of a networking event listener in certain Firefox/Thunderbird environments. Concrete details from connected docs show the issue as a memory-access crash stemming from a premature release, affecting Firefox/Firefo...

CVE-2018-5185

CVE-2018-5185 is a vulnerability in Mozilla Thunderbird where plaintext of decrypted emails can leak through when a user submits an embedded form. The public descriptions specify the affected products as Thunderbird ESR < 52.8 and Thunderbird

CVE-2026-12295

A sandbox escape vulnerability exists in the DOM: Navigation component of the Mozilla Firefox and Thunderbird applications. This flaw allows an attacker to bypass sandbox restrictions, potentially leading to significant impact on the host system. The vulnerability has been addressed in Firefox 15...

CVE-2026-16383

A mitigation bypass vulnerability exists in the DOM: Networking component of Mozilla Firefox and Thunderbird . This flaw could allow an attacker to circumvent established security measures. The vulnerability has been addressed in Firefox 153 , Firefox ESR 140.13 , Thunderbird 153 , and Thunderbir...

CVE-2026-7322

Mozilla Thunderbird and Firefox (including Firefox ESR ) are affected by memory safety bugs in versions Thunderbird ESR 140.10.0 , Thunderbird 150.0.0 , Firefox ESR 140.10.0 , Firefox ESR 115.35.0 , and Firefox 150.0.0 . These vulnerabilities involve operations executing outside of memory buffers...

CVE-2009-0773

Mode C: The CVE-2009-0773 issue affects Mozilla Firefox (and related Mozilla-based browsers) prior to 3.0.7, Thunderbird prior to 2.0.0.21, and SeaMonkey 1.1.15. The vulnerability is in the JavaScript engine and is triggered by: (1) a splice of an array containing some non-set elements, causing j...

CVE-2011-2377

CVE-2011-2377 affects Mozilla Firefox (Firefox <3.6.18 and 4.x ≤ 4.0.1), Thunderbird (

CVE-2012-0477

CVE-2012-0477 is one of multiple XSS-related issues affecting Mozilla Firefox 4.x–11.0, ESR 10.x before 10.0.4, Thunderbird 5.0–11.0, Thunderbird ESR 10.x before 10.0.4, and SeaMonkey before 2.9. It enables remote attackers to inject arbitrary web script or HTML via decoding of (1) ISO-2022-KR or...

CVE-2012-0479

CVE-2012-0479 affects Mozilla Firefox (4.x–11.0; ESR 10.x before 10.0.4), Thunderbird (5.0–11.0), and SeaMonkey (before 2.9). Root cause per description: spoofing of the address bar via an https URL for invalid RSS/Atom XML content. This enables remote attackers to mislead users about the site th...

CVE-2012-3992

CVE-2012-3992 affects Mozilla Firefox (and related Firefox-based apps) where history data is not properly handled. The flaw lets remote attackers perform cross-site scripting (XSS) or obtain sensitive POST content via a location.hash write operation combined with history navigation that loads a U...

CVE-2012-4181

CVE-2012-4181 is a use-after-free in Mozilla Firefox's nsSMILAnimationController::DoSample that can lead to remote code execution or a denial of service (heap memory corruption). Affected products include Mozilla Firefox before 16.0, Firefox ESR 10.x before 10.0.8, Thunderbird before 16.0, Thunde...

CVE-2014-1563

Mozilla Firefox before 32.0 (and ESR 31.x before 31.1) and Thunderbird 31.x before 31.1 are affected by a use-after-free in mozilla::DOMSVGLength::GetTearOff triggered by an SVG animation with DOM interactions, enabling remote code execution or a denial of service via heap memory corruption. Upgr...

CVE-2021-4126

The CVE-2021-4126 issue affects Thunderbird: when receiving an OpenPGP/MIME signed email with an outer MIME layer (e.g., mailing list footer), Thunderbird incorrectly treated inner content as signed. The root cause is that the displayed signature status was based on the inner part; since 91.4.1, ...

CVE-2026-12291

A use-after-free vulnerability exists in the Networking: HTTP component of Mozilla products. This flaw affects Firefox and Thunderbird , specifically impacting versions prior to Firefox 152 , Firefox ESR 140.12 , Firefox ESR 115.37 , Thunderbird 152 , and Thunderbird 140.12 . Exploitation of this...

CVE-2009-1392

The CVE-2009-1392 issue affects Mozilla Firefox 3 before 3.0.11, Thunderbird before 2.0.0.22, and SeaMonkey before 1.1.17. It enables memory corruption that can cause a denial of service or potentially allow arbitrary code execution via multiple code paths in the browser engine and UI (e.g., nsEv...

CVE-2010-1207

CVE-2010-1207 concerns Mozilla Firefox and Thunderbird where a cross-origin canvas read restriction can be bypassed. The description in the connected documents states that Firefox before 3.6.7 and Thunderbird before 3.1.1 do not properly enforce read restrictions for CANVAS elements, allowing a r...

CVE-2012-0458

CVE-2012-0458 affects Mozilla Firefox and related Mozilla products where a drag-and-drop of a javascript: URL to the home button could bypass restrictions and execute arbitrary JavaScript with chrome privileges in the about:sessionrestore context. Affected products include Firefox before 3.6.28 a...

CVE-2012-1947

CVE-2012-1947 describes a heap-based buffer overflow in the utf16_to_isolatin1 function affecting Mozilla Firefox 4.x–12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0–12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10. The vulnerability allows remote attackers to execute arb...

CVE-2012-5842

CVE-2012-5842 is a Mozilla Firefox browser engine vulnerability described as multiple unspecified vulnerabilities that can cause memory corruption leading to a crash or possibly remote code execution. Affected products/versions per description: Mozilla Firefox before 17.0, Firefox ESR 10.x before...

CVE-2014-1577

CVE-2014-1577 affects Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2. The issue is in mozilla::dom::OscillatorNodeEngine::ComputeCustom() within Web Audio, where an invalid custom waveform can trigger a negative frequency, leading to an out-of-bounds r...

CVE-2014-1593

CVE-2014-1593 is a stack-based buffer overflow in Mozilla Firefox’s mozilla::FileBlockCache::Read that could allow remote code execution via crafted media content. Affected products and versions in the provided documents: Mozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird befo...

CVE-2015-0833

CVE-2015-0833 affects Mozilla Firefox (pre-36.0), Firefox ESR (pre-31.x up to 31.5), and Thunderbird (pre-31.5) on Windows. It is a local privilege-escalation via untrusted search paths where a Trojan horse DLL (e.g., bcrypt.dll) in the current working directory or a temporary directory is loaded...

CVE-2015-2740

CVE-2015-2740 affects Mozilla Firefox (and Thunderbird) with a buffer overflow in nsXMLHttpRequest::AppendToResponseText, allowing remote denial of service or other impact. Affected: Firefox before 39.0; Firefox ESR 31.x before 31.8 and 38.x before 38.1. Remediation: upgrade to Firefox 39.0+ (and...

CVE-2026-12289

The Graphics: WebRender component in Mozilla Firefox and Mozilla Thunderbird is susceptible to a privilege escalation vulnerability. This flaw allows attackers to gain elevated privileges on a system. The issue has been addressed in several releases, including Firefox 152 , Firefox ESR 140.12 , F...

CVE-2026-16375

The Networking: HTTP component in Mozilla Firefox and Mozilla Thunderbird is affected by a site isolation issue (CVE-2026-16375). The vulnerability has been resolved in Firefox 153 , Firefox ESR 140.13 , and Thunderbird 153 (including Thunderbird 140.13 ). For Amazon Linux 2 , the fix is availabl...

CVE-2026-2757

CVE-2026-2757 (FF/Thunderbird) is confirmed with root cause: incorrect boundary conditions in the WebRTC: Audio/Video component, fixed in Firefox 148, Firefox ESR 115.33/140.8 ESR, Thunderbird 148/140.8. Affected products explicitly include Firefox and Thunderbird lines in multiple advisories (AL...

CVE-2009-1309

CVE-2009-1309 affects Mozilla Firefox (pre-3.0.9) and its related Mozilla suite components (Thunderbird, SeaMonkey). The issue arises from improper Same Origin Policy handling for XMLHttpRequest (document principal mismatch) and XPCNativeWrapper.toString (incorrect proto scope), enabling cross-si...

CVE-2009-3984

CVE-2009-3984 affects Mozilla Firefox up to 3.0.16 and Firefox 3.5.x up to 3.5.6, as well as SeaMonkey up to 2.0.1. Root cause: spoofing of the SSL indicator by navigating a document.location to an HTTPS URL that serves a 204 No Content with an empty body, enabling a user-facing location-bar spoo...

CVE-2010-2754

CVE-2010-2754 affects Mozilla Firefox 3.5.x before 3.5.11, Firefox 3.6.x before 3.6.7, Thunderbird 3.0.x before 3.0.6 and 3.1.x before 3.1.1, and SeaMonkey before 2.0.6. It relates to the window.onerror path and may allow a remote attacker to obtain sensitive information about script parameters v...

CVE-2012-1957

CVE-2012-1957 : An unspecified parser-utility class in Mozilla Firefox 4.x–13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0–13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 mishandles EMBED elements inside RSS description feeds, enabling remote XSS via a feed. Affected pro...

CVE-2012-3984

CVE-2012-3984 affects Mozilla Firefox (<16.0), Mozilla Thunderbird (<16.0), and SeaMonkey (

CVE-2013-5593

The CVE-2013-5593 issue affects Mozilla Firefox (and related Mozilla products) where the SELECT element’s handling of HTML in dropdowns did not properly restrict content, allowing remote attackers to spoof the address bar or perform clickjacking via navigation-redirect vectors. Affected products/...

CVE-2014-1550

CVE-2014-1550 is a use-after-free in Mozilla Firefox (before 31.0) and Thunderbird (before 31.0) affecting the MediaInputPort class. The underlying issue is a heap memory corruption caused by incorrect Web Audio control-message ordering, which could allow a remote attacker to execute arbitrary co...

CVE-2016-1522

CVE-2016-1522 affects Graphite 2 Libgraphite (Graphite2 1.2.4) used in Firefox/Firefox ESR before 43.0. Code.cpp does not account for recursive load calls during a size check, enabling a remote attacker to trigger a denial of service (heap-based buffer overflow) or possibly execute arbitrary code...

CVE-2017-5413

CVE-2017-5413 : A segmentation fault can occur during bidirectional layout operations in Mozilla Firefox and Thunderbird. Affected products include Firefox and Thunderbird versions earlier than 52 (Firefox 52.x, Thunderbird 52.x) with the root cause described as a crash in bidirectional processin...

CVE-2017-7752

CVE-2017-7752 is a use-after-free vulnerability triggered by specific user interactions with the input method editor (IME) in certain languages. The flaw is reported to affect Mozilla Firefox versions before 54, Firefox ESR before 52.2, and Thunderbird before 52.2. The impacted component is tied ...

CVE-2026-6746

A Use-after-free vulnerability exists in the DOM: Core & HTML component of Mozilla Firefox , Firefox ESR , and the Thunderbird email client. This memory safety issue allows for the reuse of memory after it has been released, which could enable a remote attacker to cause service interruptions . Th...

CVE-2012-4213

The CVE-2012-4213 issue is a concrete use-after-free vulnerability in Mozilla codepath: nsEditor::FindNextLeafNode affects Firefox and related products. Affected components per the initial description are Mozilla Firefox before 17.0, Thunderbird before 17.0, and SeaMonkey before 2.14, with remote...

CVE-2012-5836

CVE-2012-5836 affects Mozilla Firefox (before 17.0), Mozilla Thunderbird (before 17.0), and SeaMonkey (before 2.14). The issue can allow remote code execution or an application crash when CSS properties are combined with SVG text, due to the root cause described by MFSA 2012-94. Public advisories...

CVE-2014-8639

CVE-2014-8639 affects Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32. It improperly interprets Set-Cookie headers in responses with a 407 Proxy Authentication Required status, enabling a remote proxy to perform session fixation by inj...

CVE-2015-2729

Mozilla Firefox contains an out-of-bounds read in AudioParamTimeline::AudioNodeInputValue affecting Web Audio oscillator rendering range (pre-39.0 and ESR 38.x before 38.1). Remote attackers could disclose a few bytes of memory or trigger a DoS. The fix is to upgrade Firefox to 39.0+ (and ESR 38....

CVE-2018-12368

CVE-2018-12368 describes a policy bypass where Windows 10 does not warn before opening SettingContent-ms files, enabling a WebExtension with downloads.open to execute arbitrary code without user interaction. Connected advisories confirm the issue affects Windows 10 and Mozilla products (Thunderbi...

CVE-2018-5170

CVE-2018-5170 is a vulnerability in Mozilla Thunderbird (including ESR) where an attacker can spoof the filename of an attachment, causing a user to open a remote attachment with an arbitrary file type. Affected products include Thunderbird/Thunderbird ESR before version 52.8. The underlying issu...

CVE-2021-29949

CVE-2021-29949 concerns Thunderbird and the OTR protocol library loading. The issue: during startup, Thunderbird may load a shared OTR library using a filename not distributed by Thunderbird. If a system already hosts a malicious copy of that alternative filename and the library is on the executa...

CVE-2025-2830

Mozilla Thunderbird is vulnerable to an information disclosure flaw (CVE-2025-2830) caused by incorrect restrictions on the path to the restricted catalog . By crafting a malformed file name for an attachment within a multipart message, a remote attacker can trick the client into including a dire...

CVE-2025-3932

Mozilla Thunderbird is vulnerable to a flaw where an attacker can craft an email displaying a tracking link as an attachment. When a user attempts to open this attachment, Thunderbird automatically accesses the link, bypassing the configuration designed to block remote content. The root cause inv...