CVE-2012-4185

CVE-2012-4185 describes a buffer overflow in Mozilla Firefox’s nsCharTraits::length function that could allow remote code execution or a heap memory corruption in Firefox <16.0, ESR 10.x <10.0.8, Thunderbird <16.0/ESR 10.x <10.0.8, and SeaMonkey

CVE-2017-5419

CVE-2017-5419 is a denial-of-service vulnerability affecting Mozilla Firefox and Thunderbird prior to version 52. The issue arises when a malicious page repeatedly triggers a modal authentication prompt, causing the browser UI to become unresponsive. Public references describe this as a DOS condi...

CVE-2026-16391

A vulnerability in the Storage: IndexedDB component of the Mozilla Firefox and Thunderbird browsers allows for information disclosure . This issue has been addressed in Firefox 153 , Firefox ESR 140.13 , Thunderbird 153 , and Thunderbird 140.13 . Exploitation details are not provided in the docum...

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-2026-84121

Mozilla Firefox and Thunderbird are affected by a sandbox escape vulnerability caused by a use-after-free in the DOM: Security component . This security flaw could allow an attacker to escape the sandbox environment. The issue has been addressed in Firefox 155 , Firefox ESR 115.40 , Firefox ESR 1...

CVE-2012-3991

CVE-2012-3991 affects Mozilla Firefox and related Mozilla products: Firefox and Firefox ESR before the 16.0 line, Thunderbird before 16.0, and SeaMonkey before 2.13 did not properly restrict JSAPI GetProperty access, bypassing the Same Origin Policy. This vulnerability could allow remote attacker...

CVE-2013-0749

CVE-2013-0749 describes multiple unspecified vulnerabilities in the Mozilla Firefox browser engine (before 18.0) and related products (Firefox ESR 17.x before 17.0.1, Thunderbird before 17.0.2 and ESR 17.x before 17.0.1, SeaMonkey before 2.15). The description states that remote attackers could c...

CVE-2013-0760

CVE-2013-0760 describes a buffer overflow in Mozilla Firefox’s CharDistributionAnalysis::HandleOneChar, allowing remote code execution via a crafted document. Affected products per the description: Firefox before 18.0, Thunderbird before 17.0.2, and SeaMonkey before 2.15. Root cause is a memory c...

CVE-2013-0764

CVE-2013-0764 affects Mozilla Firefox (before 18.0), Firefox ESR (before 17.0.2), Thunderbird (before 17.0.2 and ESR 17.x before 17.0.2), and SeaMonkey (before 2.15). The vulnerability is a thread-safety issue in nsSOCKSSocketInfo::ConnectToProxy that can allow remote code execution through craft...

CVE-2018-5144

CVE-2018-5144 describes an integer overflow during Unicode text conversion caused by an unchecked length parameter. Affected products: Firefox ESR and Thunderbird (pre-52.7). Root cause: overflow during Unicode conversion. Impact: potential remote code execution or memory issues as implied by the...

CVE-2025-3522

The Mozilla Thunderbird email client is vulnerable to an information disclosure flaw because it fails to properly validate or sanitize the X-Mozilla-External-Attachment-URL header. When opening an email, Thunderbird accesses the provided URL to determine file size and navigates to it upon a user ...

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-2011-1187

CVE-2011-1187 affects Google Chrome prior to 10.0.648.127, allowing remote attackers to bypass the Same Origin Policy via an unspecified error-message leak vector. The vulnerability targets the browser’s SOP checks, enabling cross-origin access that should be restricted. Public sources within the...

CVE-2013-0776

CVE-2013-0776 affects Mozilla Firefox before 19.0, Firefox ESR 17.x before 17.0.3, Thunderbird before 17.0.3, Thunderbird ESR 17.x before 17.0.3, and SeaMonkey before 2.16. The flaw allows a man-in-the-middle attacker to spoof the address bar by using a proxy server that returns a 407 HTTP status...

CVE-2017-5467

CVE-2017-5467 affects Mozilla Firefox and Thunderbird, with memory corruption when drawing Skia content outside the clipping region. Affected: Firefox (<53) and Thunderbird (

CVE-2017-7758

CVE-2017-7758 describes an out-of-bounds read in the Opus encoder when the number of channels in an audio stream changes during encoding. Affected products include Firefox < 54, Firefox ESR < 52.2, and Thunderbird

CVE-2023-29545

CVE-2023-29545 describes a Windows Save As issue where Firefox/Thunderbird could resolve environment-variable-like names in suggested filenames to the current user context. Affected: Firefox and Thunderbird on Windows; versions affected per the entry are Firefox < 112, Firefox ESR < 102.10,...

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-2009-1308

A Cross-site scripting (XSS) vulnerability exists in Mozilla Firefox (before 3.0.9), Thunderbird , and SeaMonkey . The root cause involves vectors utilizing XBL JavaScript bindings and remote stylesheets , which allow remote attackers to inject arbitrary web script or HTML. This vulnerability was...

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-2017-5451

CVE-2017-5451 describes an address bar spoofing vulnerability via the onblur event, enabling a script to affect text display and make the loaded site appear different from what’s in the address bar. The issue affects Mozilla products including Thunderbird < 52.1, Firefox ESR < 52.1, and Fir...

CVE-2023-37208

CVE-2023-37208 affects Firefox (<115), Firefox ESR (<102.13), and Thunderbird (

CVE-2025-5986

The Mozilla Thunderbird email client is vulnerable to unsolicited file downloads , disk space exhaustion, and credential leakage due to insufficient validation of mailbox:/// links . A crafted HTML email can trigger automatic downloads of .pdf files to a user's desktop or home directory without p...

CVE-2026-12304

A same-origin policy bypass vulnerability exists in the Networking: Cookies component of Firefox and Thunderbird . This flaw allows for the circumvention of security boundaries designed to isolate web content. The vulnerability has been addressed in Firefox 152 , Firefox ESR 140.12 , Thunderbird ...

CVE-2012-0449

CVE-2012-0449 affects Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7. Description: remote attackers can cause memory corruption and application crash, or possibly execute arbitrary code via a malformed XSLT stylesheet emb...

CVE-2012-4207

CVE-2012-4207 affects Mozilla Firefox before 17.0, Firefox ESR 10.x before 10.0.11, Thunderbird before 17.0 / ESR 10.x, and SeaMonkey before 2.14. The flaw in the HZ-GB-2312 charset implementation allows remote attackers to perform cross-site scripting (XSS) via a crafted document, due to imprope...

CVE-2026-16360

Mozilla released security updates to address memory safety bugs in Firefox ESR 115.37 , Firefox ESR 140.12 , and Firefox 152 . These vulnerabilities involve memory corruption issues that could potentially be exploited to execute arbitrary code with sufficient effort. The issues are also present i...

CVE-2012-4188

CVE-2012-4188 is a heap-based buffer overflow in Mozilla Firefox’s Convolve3x3 path, affecting Firefox before 16.0 (and ESR 10.x before 10.0.8), Thunderbird before 16.0 (and ESR 10.x before 10.0.8), and SeaMonkey before 2.13. The vulnerability allows remote code execution via unspecified vectors;...

CVE-2012-4202

CVE-2012-4202 describes a heap-based buffer overflow in Firefox’s image::RasterImage::DrawFrameTo, exploitable via a crafted GIF image to execute arbitrary code. Affected products include Mozilla Firefox before 17.0, Firefox ESR before 10.0.11 (10.x), Thunderbird before 17.0, Thunderbird ESR befo...

CVE-2013-0761

CVE-2013-0761 is a use-after-free vulnerability in Firefox’s mozilla::TrackUnionStream::EndTrack that could allow remote code execution or a denial of service via heap memory corruption. Affected products include Firefox before 18.0 (and ESR 17.x before 17.0.1), Thunderbird before 17.0.2 (and ESR...

CVE-2013-0773

CVE-2013-0773 corresponds to a vulnerability in the Chrome Object Wrapper (COW) and System Only Wrapper (SOW) security wrappers in Mozilla-based products. The issue allowed modifications to a prototype, enabling a non-specified remote site to access chrome objects or potentially execute JavaScrip...

CVE-2013-5618

CVE-2013-5618 is a use-after-free in Mozilla Firefox’s table-editing UI (nsNodeUtils::LastRelease). Affected: Firefox < 26.0, Firefox ESR < 24.2, Thunderbird < 24.2, SeaMonkey

CVE-2017-7749

This CVE-2017-7749 is a use-after-free in the docshell reload path that affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird

CVE-2025-9179

Mozilla Firefox and Thunderbird are affected by a memory corruption vulnerability in the GMP process , which handles encrypted media. Although this process is heavily sandboxed, it operates with different privileges than the content process. Exploitation of this vulnerability may allow for a sand...

CVE-2026-6770

A vulnerability exists in the Storage: IndexedDB component affecting Mozilla Firefox and Thunderbird . This issue can allow an attacker to compromise the confidentiality and accessibility of protected information. The vulnerability has been addressed in Firefox 150 , Firefox ESR 140.10 , Thunderb...

CVE-2013-5615

CVE-2013-5615 concerns GetElementIC typed array stubs being generated outside observed typesets in the Mozilla JavaScript engine. The connected vendor notes identify affected products as Mozilla Firefox (and related Firefox ESR/Thunderbird/SeaMonkey lines in the 2013 MFSA bundle) with fixes imple...

CVE-2017-5421

CVE-2017-5421 is reported as a print preview spoofing issue affecting Mozilla Firefox and Mozilla Thunderbird when popup windows are enabled. The vulnerability description states that a malicious site could spoof the contents of the print preview window, causing user confusion about which site is...

CVE-2018-5174

CVE-2018-5174 involves Windows Defender SmartScreen honoring the SEE_MASK_FLAG_NO_UI flag, allowing downloaded files to run without UI prompts on Windows 10 April 2018 Update and later. The issue, as documented in NVD and reflected in the connected Nessus/SUSE advisories, notes that Firefox and T...

CVE-2013-0745

This CVE (CVE-2013-0745) affects Mozilla Firefox prior to 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15. It is caused by the AutoWrapperChanger not interacting correctly with garbage collection, enabling remote code ...

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-2026-12294

A sandbox escape vulnerability exists in the DOM: Workers component of Mozilla Firefox and Mozilla Thunderbird . This flaw allows an attacker to break out of the browser's sandbox environment. The issue has been addressed in Firefox 152 , Firefox ESR 140.12 , Firefox ESR 115.37 , Thunderbird 152 ...

CVE-2026-6772

A heap buffer overflow exists in the NSS (Network Security Services) Libraries component due to incorrect boundary conditions. Specifically, the SSL_MAX_EXTENSIONS constant is set to 22, while 23 TLS extensions actually exist, leading to an off-by-one overflow during negotiation. This vulnerabili...

CVE-2026-6776

Mozilla Firefox , Firefox ESR , and the Thunderbird email client are vulnerable to a security issue in the WebRTC: Networking component due to incorrect boundary conditions . Specifically, the vulnerability arises from the execution of operations outside of the buffer in memory, which could allow...

CVE-2026-74988

Internal bugs were discovered in Thunderbird ESR 153.0 and Thunderbird 153.0 , where some defects exhibited evidence of memory corruption or other security-relevant issues. While the specific root cause is not detailed, it is presumed that these flaws could be exploited with sufficient effort. Th...

CVE-2011-3062

CVE-2011-3062 : An off-by-one error in the OpenType Sanitizer used by Google Chrome prior to 18.0.1025.142 allows remote attackers to cause a denial of service or possibly other impact via a crafted OpenType file. The MiracleLinux/OpenSUSE/Oracle Solaris advisories reference this CVE as part of C...

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-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-2026-74956

A Same-origin policy bypass vulnerability exists in the DOM: Service Workers component. This issue affects Firefox , Firefox ESR , and Thunderbird . The vulnerability has been addressed in Firefox 154 , Firefox ESR 153.1 , Thunderbird 154 , and Thunderbird 153.1 . No specific exploit information ...

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...