Mozilla Firefox vulnerabilities

CVE-2026-109707 [CRITICAL] Mozilla Foundation Security Advisory 2026-106: CVE-2026-109707 Mozilla Foundation Security Advisory 2026-106 CVE: CVE-2026-109707 Product: Firefox Impact: low Fixed in: Firefox 158

CVE-2016-1522 [HIGH] CWE-119 CVE-2016-1522: Code.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR Code.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, does not consider recursive load calls during a size check, which allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly execute arbitrary code via a crafted Graphite smart font.

CVE-2026-100829 [CRITICAL] CWE-693 CVE-2026-100829: Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

CVE-2007-1377 [MEDIUM] CVE-2007-1377: AcroPDF.DLL in Adobe Reader 8.0, when accessed from Mozilla Firefox, Netscape, or Opera, allows remo AcroPDF.DLL in Adobe Reader 8.0, when accessed from Mozilla Firefox, Netscape, or Opera, allows remote attackers to cause a denial of service (unspecified resource consumption) via a .pdf URL with an anchor identifier that begins with search= followed by many %n sequences, a different vulnerability than CVE-2006-6027 and CVE-2006-6236.

CVE-2022-22744 [HIGH] CWE-116 CVE-2022-22744: The constructed curl command from the "Copy as curl" feature in DevTools was not properly escaped fo The constructed curl command from the "Copy as curl" feature in DevTools was not properly escaped for PowerShell. This could have lead to command injection if pasted into a Powershell prompt.*This bug only affects Thunderbird for Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunder

CVE-2017-5461 [CRITICAL] CWE-787 CVE-2017-5461: Mozilla Network Security Services (NSS) before 3.21.4, 3.22.x through 3.28.x before 3.28.4, 3.29.x b Mozilla Network Security Services (NSS) before 3.21.4, 3.22.x through 3.28.x before 3.28.4, 3.29.x before 3.29.5, and 3.30.x before 3.30.1 allows remote attackers to cause a denial of service (out-of-bounds write) or possibly have unspecified other impact by leveraging incorrect base64 operations.

CVE-2025-6427 [CRITICAL] CWE-693 CVE-2025-6427: An attacker was able to bypass the `connect-src` directive of a Content Security Policy by manipulat An attacker was able to bypass the `connect-src` directive of a Content Security Policy by manipulating subdocuments. This would have also hidden the connections from the Network tab in Devtools. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

CVE-2012-1967 [CRITICAL] CVE-2012-1967: Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thun Mozilla Firefox 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 do not properly implement the JavaScript sandbox utility, which allows remote attackers to execute arbitrary JavaScript code with improper privileges via a javascript: URL.

CVE-2026-16381 [CRITICAL] CWE-346 CVE-2026-16381: Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox Same-origin policy bypass in the Networking: DNS component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVE-2024-11697 [HIGH] CWE-94 CVE-2024-11697: When handling keypress events, an attacker may have been able to trick a user into bypassing the "Op When handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?" confirmation dialog. This could have led to malicious code execution. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

CVE-2010-3772 [CRITICAL] CWE-189 CVE-2010-3772: Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, does not properl Mozilla Firefox before 3.5.16 and 3.6.x before 3.6.13, and SeaMonkey before 2.0.11, does not properly calculate index values for certain child content in a XUL tree, which allows remote attackers to execute arbitrary code via vectors involving a DIV element within a treechildren element.

CVE-2018-5146 [HIGH] CWE-787 CVE-2018-5146: An out of bounds memory write while processing Vorbis audio data was reported through the Pwn2Own co An out of bounds memory write while processing Vorbis audio data was reported through the Pwn2Own contest. This vulnerability affects Firefox < 59.0.1, Firefox ESR < 52.7.2, and Thunderbird < 52.7.

CVE-2015-4497 [CRITICAL] CVE-2015-4497: Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox befor Use-after-free vulnerability in the CanvasRenderingContext2D implementation in Mozilla Firefox before 40.0.3 and Firefox ESR 38.x before 38.2.1 allows remote attackers to execute arbitrary code by leveraging improper interaction between resize events and changes to Cascading Style Sheets (CSS) token sequences for a CANVAS element.

CVE-2026-12328 [HIGH] CWE-120 CVE-2026-12328: Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefo Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Fir

CVE-2026-12327 [HIGH] CWE-119 CVE-2026-12327: Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbir Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Th

CVE-2012-4180 [CRITICAL] CWE-119 CVE-2012-4180: Heap-based buffer overflow in the nsHTMLEditor::IsPrevCharInNodeWhitespace function in Mozilla Firef Heap-based buffer overflow in the nsHTMLEditor::IsPrevCharInNodeWhitespace function in Mozilla 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 before 2.13 allows remote attackers to execute arbitrary code via unspecified vectors.

CVE-2018-12387 [CRITICAL] CWE-20 CVE-2018-12387: A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple argumen A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content process. This vulnerability affects Firefox ESR < 60.2

CVE-2017-5391 [CRITICAL] CVE-2017-5391: Special "about:" pages used by web content, such as RSS feeds, can load privileged "about:" pages in Special "about:" pages used by web content, such as RSS feeds, can load privileged "about:" pages in an iframe. If a content-injection bug were found in one of those pages this could allow for potential privilege escalation. This vulnerability affects Firefox < 51.

CVE-2011-0055 [CRITICAL] CWE-399 CVE-2011-0055: Use-after-free vulnerability in the JSON.stringify method in js3250.dll in Mozilla Firefox before 3. Use-after-free vulnerability in the JSON.stringify method in js3250.dll in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, and SeaMonkey before 2.0.12, might allow remote attackers to execute arbitrary code via unspecified vectors related to the js_HasOwnProperty function and garbage collection.

CVE-2013-1732 [CRITICAL] CWE-119 CVE-2013-1732: Buffer overflow in the nsFloatManager::GetFlowArea function in Mozilla Firefox before 24.0, Firefox Buffer overflow in the nsFloatManager::GetFlowArea function in Mozilla Firefox before 24.0, Firefox ESR 17.x before 17.0.9, Thunderbird before 24.0, Thunderbird ESR 17.x before 17.0.9, and SeaMonkey before 2.21 allows remote attackers to execute arbitrary code via crafted use of lists and floats within a multi-column layout.