Mozilla vulnerabilities
Published CVEs affecting Mozilla products: 652 record(s), with severity, exploitation and fixes.
Firefox 616Thunderbird 533Firefox Mobile 17Firefox ESR 12Firefox Focus 4Focus 3Thunderbird Esr 2Firefox for Android 2Firefox Os 1Seamonkey 1Thin-vec 10din Scanner 1Rhino 1Klar 1Node-convict 1Network Security Services 1
CVE-2026-2757
Critical · 9.8
CWE-1384 Feb 24, 2026
Incorrect boundary conditions in the WebRTC: Audio/Video component
Incorrect boundary conditions in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
CVE-2026-2634
Critical · 9.8
CWE-451 Feb 24, 2026
Spoofed web content presented under trusted domains using scripted navigation on Firefox iOS
Malicious scripts could cause desynchronization between the address bar and web content before a response is received in Firefox iOS, allowing attacker-controlled pages to be presented under spoofed domains. This vulnerability was fixed in Firefox for iOS 147.4.
CVE-2026-2447
High · 8.8
CWE-122 Feb 16, 2026
Heap buffer overflow in libvpx
Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.
CVE-2026-2032
Medium · 4.3
CWE-451 Feb 16, 2026
Interrupted page loads in new tabs could allow website spoofing under trusted domains in Firefox iOS
Malicious scripts that interrupt new tab page loading could cause desynchronization between the address bar and page content, allowing the attacker to spoof arbitrary HTML under a trusted domain. This vulnerability was fixed in Firefox for iOS 147.2.1.
CVE-2026-0818
Medium · 4.3
CWE-116 Jan 28, 2026
CSS-based exfiltration of the content from partially encrypted emails when allowing remote content
When a user explicitly requested Thunderbird to decrypt an inline OpenPGP message that was embedded in a text section of an email that was formatted and styled with HTML and CSS, then the decrypted contents were rendered in a context in which the CSS styles from the outer messages were active. If the user had additionally allowed loading of the remote content referenced by the outer email message, and the email was crafted by the sender using a combination of CSS rules and fonts and animations, then it was possible to extract the secret contents of the email. This vulnerability was fixed in Thunderbird 147.0.1 and Thunderbird 140.7.1.
CVE-2026-24869
High · 8.8
CWE-416 Jan 27, 2026
Use-after-free in the Layout: Scrolling and Overflow component
Use-after-free in the Layout: Scrolling and Overflow component. This vulnerability was fixed in Firefox 147.0.2.
CVE-2026-24868
Medium · 6.5
CWE-693 Jan 27, 2026
Mitigation bypass in the Privacy: Anti-Tracking component
Mitigation bypass in the Privacy: Anti-Tracking component. This vulnerability was fixed in Firefox 147.0.2.
CVE-2026-0892
Critical · 9.8
CWE-119 Jan 13, 2026
Memory safety bugs fixed in Firefox 147 and Thunderbird 147
Memory safety bugs present in Firefox 146 and Thunderbird 146. 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 147 and Thunderbird 147.
CVE-2026-0891
High · 8.1
CWE-119 Jan 13, 2026
Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147
Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. 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 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0890
Medium · 5.4
CWE-290 Jan 13, 2026
Spoofing issue in the DOM: Copy & Paste and Drag & Drop component
Spoofing issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0889
High · 7.5
CWE-400 Jan 13, 2026
Denial-of-service in the DOM: Service Workers component
Denial-of-service in the DOM: Service Workers component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
CVE-2026-0888
Medium · 5.3
CWE-200 Jan 13, 2026
Information disclosure in the XML component
Information disclosure in the XML component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
CVE-2026-0887
Medium · 4.3
CWE-497 Jan 13, 2026
Clickjacking issue, information disclosure in the PDF Viewer component
Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0886
Medium · 5.3
CWE-119 Jan 13, 2026
Incorrect boundary conditions in the Graphics component
Incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0885
Medium · 6.5
CWE-416 Jan 13, 2026
Use-after-free in the JavaScript: GC component
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0884
Critical · 9.8
CWE-416 Jan 13, 2026
Use-after-free in the JavaScript Engine component
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0883
Medium · 5.3
CWE-200 Jan 13, 2026
Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0882
High · 8.8
CWE-416 Jan 13, 2026
Use-after-free in the IPC component
Use-after-free in the IPC component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0881
Critical · 10.0
CWE-284 Jan 13, 2026
Sandbox escape in the Messaging System component
Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.
CVE-2026-0880
High · 8.8
CWE-190 Jan 13, 2026
Sandbox escape due to integer overflow in the Graphics component
Sandbox escape due to integer overflow in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0879
Critical · 9.8
CWE-119 Jan 13, 2026
Sandbox escape due to incorrect boundary conditions in the Graphics component
Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0878
High · 8.0
CWE-20 Jan 13, 2026
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component
Sandbox escape due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2026-0877
High · 8.1
CWE-693 Jan 13, 2026
Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVE-2025-14861
High · 8.8
CWE-119 Dec 18, 2025
Memory safety bugs fixed in Firefox 146.0.1
Memory safety bugs present in Firefox 146. 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 146.0.1.
CVE-2025-14860
Critical · 9.8
CWE-416 Dec 18, 2025
Use-after-free in the Disability Access APIs component
Use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 146.0.1.