Mozilla Firefox Esr vulnerabilities

CVE-2026-109765 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109765 Mozilla Foundation Security Advisory 2026-108 CVE: CVE-2026-109765 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.5

CVE-2026-109719 [MEDIUM] Mozilla Foundation Security Advisory 2026-107: CVE-2026-109719 Mozilla Foundation Security Advisory 2026-107 CVE: CVE-2026-109719 Product: Firefox ESR Impact: moderate Fixed in: Firefox ESR 115.43

CVE-2022-3266 [MEDIUM] CWE-125 CVE-2022-3266: An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable An out-of-bounds read can occur when decoding H264 video. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.3, Thunderbird < 102.3, and Firefox < 105.

CVE-2012-0451 [MEDIUM] CWE-94 CVE-2012-0451: CRLF injection vulnerability in Mozilla Firefox 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Th CRLF injection vulnerability in Mozilla Firefox 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 allows remote web servers to bypass intended Content Security Policy (CSP) restrictions and possibly conduct cross-site scripting (XSS) attacks via crafted HTTP head

CVE-2018-12367 [MEDIUM] CWE-20 CVE-2018-12367: In the previous mitigations for Spectre, the resolution or precision of various methods was reduced In the previous mitigations for Spectre, the resolution or precision of various methods was reduced to counteract the ability to measure precise time intervals. In that work PerformanceNavigationTiming was not adjusted but it was found that it could be used as a precision timer. This vulnerability affects Thunderbird < 60, Firefox ESR < 60.1, and Fire

CVE-2015-2741 [MEDIUM] CWE-310 CVE-2015-2741: Mozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 do not enforc Mozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 do not enforce key pinning upon encountering an X.509 certificate problem that generates a user dialog, which allows user-assisted man-in-the-middle attackers to bypass intended access restrictions by triggering a (1) expired certificate or (2) mismatched hostname f

CVE-2021-23969 [MEDIUM] CVE-2021-23969: As specified in the W3C Content Security Policy draft, when creating a violation report, "User agent As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the s

CVE-2015-0833 [MEDIUM] CVE-2015-0833: Multiple untrusted search path vulnerabilities in updater.exe in Mozilla Firefox before 36.0, Firefo Multiple untrusted search path vulnerabilities in updater.exe in Mozilla Firefox before 36.0, Firefox ESR 31.x before 31.5, and Thunderbird before 31.5 on Windows, when the Maintenance Service is not used, allow local users to gain privileges via a Trojan horse DLL in (1) the current working directory or (2) a temporary directory, as demonstrated by bcrypt.dl

CVE-2023-5726 [MEDIUM] CVE-2023-5726: A website could have obscured the full screen notification by using the file open dialog. This could A website could have obscured the full screen notification by using the file open dialog. This could have led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.

CVE-2023-32212 [MEDIUM] CVE-2023-32212: An attacker could have positioned a `datalist` element to obscure the address bar. This vulnerabilit An attacker could have positioned a `datalist` element to obscure the address bar. This vulnerability affects Firefox < 113, Firefox ESR < 102.11, and Thunderbird < 102.11.

CVE-2023-32205 [MEDIUM] CVE-2023-32205: In multiple cases browser prompts could have been obscured by popups controlled by content. These co In multiple cases browser prompts could have been obscured by popups controlled by content. These could have led to potential user confusion and spoofing attacks. This vulnerability affects Firefox < 113, Firefox ESR < 102.11, and Thunderbird < 102.11.

CVE-2024-0742 [MEDIUM] CVE-2024-0742: It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by the user due to an incorrect timestamp used to prevent input after page load. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

CVE-2023-29533 [MEDIUM] CVE-2023-29533: A website could have obscured the fullscreen notification by using a combination of <code>window.ope A website could have obscured the fullscreen notification by using a combination of window.open, fullscreen requests, window.name assignments, and setInterval calls. This could have led to user confusion and possible spoofing attacks. This vulnerability affects Firefox < 112, Focus for Android < 112, Firefox ESR < 102.10, Firefox for Android < 112, and Thun

CVE-2026-109742 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109742 Mozilla Foundation Security Advisory 2026-108 CVE: CVE-2026-109742 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.5

CVE-2026-109751 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109751 Mozilla Foundation Security Advisory 2026-108 CVE: CVE-2026-109751 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.5

CVE-2026-96869 [MEDIUM] Mozilla Foundation Security Advisory 2026-99: CVE-2026-96869 Mozilla Foundation Security Advisory 2026-99 CVE: CVE-2026-96869 Product: Firefox ESR Impact: moderate Fixed in: Firefox ESR 140.17

CVE-2026-109777 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109777 Mozilla Foundation Security Advisory 2026-108 CVE: CVE-2026-109777 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.5

CVE-2026-109767 [MEDIUM] Mozilla Foundation Security Advisory 2026-108: CVE-2026-109767 Mozilla Foundation Security Advisory 2026-108 CVE: CVE-2026-109767 Product: Firefox ESR Impact: low Fixed in: Firefox ESR 153.5

CVE-2020-6827 [MEDIUM] CWE-1021 CVE-2020-6827: When following a link that opened an intent://-schemed URL, causing a custom tab to be opened, Firef When following a link that opened an intent://-schemed URL, causing a custom tab to be opened, Firefox for Android could be tricked into displaying the incorrect URI. *Note: This issue only affects Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.7.

CVE-2012-0455 [MEDIUM] CWE-79 CVE-2012-0455: Mozilla Firefox before 3.6.28 and 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird befo Mozilla Firefox before 3.6.28 and 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird before 3.1.20 and 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 do not properly restrict drag-and-drop operations on javascript: URLs, which allows user-assisted remote attackers to conduct cross-site scripting (XSS) attacks