Mozilla Thunderbird vulnerabilities

CVE-2014-1493 [CRITICAL] CWE-119 CVE-2014-1493: Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 28.0, Firefox E Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 28.0, Firefox ESR 24.x before 24.4, Thunderbird before 24.4, and SeaMonkey before 2.25 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

CVE-2019-9790 [CRITICAL] CWE-416 CVE-2019-9790: A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained u A use-after-free vulnerability can occur when a raw pointer to a DOM element on a page is obtained using JavaScript and the element is then removed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

CVE-2019-9795 [CRITICAL] CWE-617 CVE-2019-9795: A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially A vulnerability where type-confusion in the IonMonkey just-in-time (JIT) compiler could potentially be used by malicious JavaScript to trigger a potentially exploitable crash. This vulnerability affects Thunderbird < 60.6, Firefox ESR < 60.6, and Firefox < 66.

CVE-2015-2716 [HIGH] CVE-2015-2716: Buffer overflow in the XML parser in Mozilla Firefox before 38.0, Firefox ESR 31.x before 31.7, and Buffer overflow in the XML parser in Mozilla Firefox before 38.0, Firefox ESR 31.x before 31.7, and Thunderbird before 31.7 allows remote attackers to execute arbitrary code by providing a large amount of compressed XML data, a related issue to CVE-2015-1283.

CVE-2024-43097 [HIGH] CVE-2024-43097: In resizeToAtLeast of SkRegion In resizeToAtLeast of SkRegion.cpp, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVE-2012-3961 [CRITICAL] CWE-416 CVE-2012-3961: Use-after-free vulnerability in the RangeData implementation in Mozilla Firefox before 15.0, Firefox Use-after-free vulnerability in the RangeData implementation in Mozilla 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 allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

CVE-2021-4127 [CRITICAL] CVE-2021-4127: An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be e An out of date graphics library (Angle) likely contained vulnerabilities that could potentially be exploited. This vulnerability affects Thunderbird < 78.9 and Firefox ESR < 78.9.

CVE-2022-31747 [CRITICAL] CWE-125 CVE-2022-31747: Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memor Mozilla developers Andrew McCreight, Nicolas B. Pierron, and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 100 and Firefox ESR 91.9. 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 affects Thund

CVE-2023-4057 [CRITICAL] CWE-787 CVE-2023-4057: Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0. Some of these b Memory safety bugs present in Firefox 115, Firefox ESR 115.0, and Thunderbird 115.0. 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 affects Firefox < 116, Firefox ESR < 115.1, and Thunderbird < 115.1.

CVE-2026-14899 [HIGH] CWE-193 CVE-2026-14899: The code to parse MIME headers for display when forwarding a message (if the setting to view all hea The code to parse MIME headers for display when forwarding a message (if the setting to view all headers was enabled) had an off-by-one error, allowing a single byte to be read from the memory after the buffer for the headers, and potentially crashing Thunderbird. This vulnerability was fixed in Thunderbird 153 and Thunderbird 140.13.

CVE-2018-5178 [HIGH] CWE-119 CVE-2018-5178: A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremel A buffer overflow was found during UTF8 to Unicode string conversion within JavaScript with extremely large amounts of data. This vulnerability requires the use of a malicious or vulnerable legacy extension in order to occur. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

CVE-2011-3655 [CRITICAL] CWE-94 CVE-2011-3655: Mozilla Firefox 4.x through 7.0 and Thunderbird 5.0 through 7.0 perform access control without check Mozilla Firefox 4.x through 7.0 and Thunderbird 5.0 through 7.0 perform access control without checking for use of the NoWaiverWrapper wrapper, which allows remote attackers to gain privileges via a crafted web site.

CVE-2018-12363 [HIGH] CWE-416 CVE-2018-12363: A use-after-free vulnerability can occur when script uses mutation events to move DOM nodes between A use-after-free vulnerability can occur when script uses mutation events to move DOM nodes between documents, resulting in the old document that held the node being freed but the node still having a pointer referencing it. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60

CVE-2026-84641 [HIGH] CWE-416 CVE-2026-84641: A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted I A malicious IMAP server can trigger use-after-free and heap-memory disclosure by sending a crafted ID response. Heap contents can ultimately be persisted to prefs.js. This vulnerability was fixed in Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.

CVE-2019-11745 [HIGH] CWE-787 CVE-2019-11745: When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

CVE-2025-1942 [CRITICAL] CWE-908 CVE-2025-1942: When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string. This vulnerability was fixed in Firefox 136 and Thunderbird 136.

CVE-2016-1961 [HIGH] CVE-2016-1961: Use-after-free vulnerability in the nsHTMLDocument::SetBody function in dom/html/nsHTMLDocument.cpp Use-after-free vulnerability in the nsHTMLDocument::SetBody function in dom/html/nsHTMLDocument.cpp in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 allows remote attackers to execute arbitrary code by leveraging mishandling of a root element, aka ZDI-CAN-3574.

CVE-2008-0304 [HIGH] CWE-119 CVE-2008-0304: Heap-based buffer overflow in Mozilla Thunderbird before 2.0.0.12 and SeaMonkey before 1.1.8 might a Heap-based buffer overflow in Mozilla Thunderbird before 2.0.0.12 and SeaMonkey before 1.1.8 might allow remote attackers to execute arbitrary code via a crafted external-body MIME type in an e-mail message, related to an incorrect memory allocation during message preview.

CVE-2024-7519 [CRITICAL] CWE-787 CVE-2024-7519: Insufficient checks when processing graphics shared memory could have led to memory corruption. This Insufficient checks when processing graphics shared memory could have led to memory corruption. This could be leveraged by an attacker to perform a sandbox escape. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.

CVE-2016-1951 [HIGH] thunderbird vulnerabilities thunderbird vulnerabilities It was discovered that NSPR incorrectly handled memory allocation. If a user were tricked in to opening a specially crafted message, an attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-1951) Christian Holler, Gary Kwong, Jesse Ruderman, Tyson Smith, Timothy Nikkel, Sylvestre Ledru, Julian Seward, Olli Pettay, and Karl Tomlinson, discovered