CVE Intelligence

Mozilla vulnerabilities

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Published CVEs affecting Mozilla products: 642 record(s), with severity, exploitation and fixes.

Firefox 606Thunderbird 523Firefox Mobile 17Firefox ESR 11Firefox Focus 4Focus 3Thunderbird Esr 2Firefox for Android 2Firefox Os 1Seamonkey 1Thin-vec 10din Scanner 1Rhino 1Klar 1Node-convict 1Network Security Services 1

Exploited only (KEV) →

CVE-2026-10701 High · 7.5 CWE-119 Jun 2, 2026
Incorrect boundary conditions in the Graphics: Text component
Incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 151.0.3.
CVE-2026-9309 Medium · 5.4 CWE-79 Jun 1, 2026
Arbitrary JavaScript execution in internal pages via Reader View JSON-LD injection
Firefox for iOS Reader View did not properly escape HTML tags in JSON-LD metadata. A malicious page could inject markup that changed Reader View behavior and leaked sensitive URL parameters. These parameters could then be used to access internal pages, potentially resulting in arbitrary JavaScript execution in an internal origin. This vulnerability was fixed in Firefox for iOS 151.2.
CVE-2026-9308 Medium · 5.4 CWE-79 Jun 1, 2026
Arbitrary JavaScript execution in Reader View due to wrong HTML replacement order
Firefox for iOS Reader View replaced page content in its HTML template before replacing other internal placeholders. A malicious page could include a placeholder string that was later substituted with JSON-LD data, potentially resulting in arbitrary JavaScript execution. This vulnerability was fixed in Firefox for iOS 151.2.
CVE-2026-9078 Medium · 5.4 CWE-451 May 25, 2026
Firefox iOS RTL Domain Rendering Issue in Link Preview
Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A crafted RTL hostname could visually reorder portions of the displayed domain, causing attacker-controlled sites to appear as trusted origins. This vulnerability was fixed in Firefox for iOS 151.1.
CVE-2026-8706 Medium · 6.5 CWE-200 May 19, 2026
Sensitive user data could be leaked to other applications through Reader mode
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
CVE-2026-8975 High · 8.8 CWE-119 May 19, 2026
Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151
Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8974 High · 8.8 CWE-119 May 19, 2026
Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151
Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8973 High · 8.8 CWE-119 May 19, 2026
Memory safety bugs fixed in Firefox 151
Memory safety bugs present in Firefox 150. 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 151 and Thunderbird 151.
CVE-2026-8972 High · 8.8 CWE-269 May 19, 2026
Privilege escalation in the WebRTC: Audio/Video component
Privilege escalation in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8971 Medium · 6.5 CWE-346 May 19, 2026
Same-origin policy bypass in the Networking: JAR component
Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8970 High · 8.8 CWE-269 May 19, 2026
Privilege escalation in the Security component
Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8969 High · 8.1 CWE-693 May 19, 2026
Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8968 High · 7.5 CWE-400 May 19, 2026
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8967 High · 7.5 CWE-200 May 19, 2026
Information disclosure in the Graphics: WebGPU component
Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8966 High · 7.5 CWE-200 May 19, 2026
Information disclosure in the IP Protection component
Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8965 High · 7.5 CWE-200 May 19, 2026
Information disclosure in the DOM: Security component
Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8964 High · 7.5 CWE-451 May 19, 2026
Spoofing issue in the Popup Blocker component
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8963 High · 7.5 CWE-290 May 19, 2026
Spoofing issue in the Web Speech component
Spoofing issue in the Web Speech component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8962 High · 8.1 CWE-693 May 19, 2026
Mitigation bypass in the DOM: Security component
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8961 Medium · 6.5 CWE-290 May 19, 2026
Spoofing issue in the Form Autofill component
Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8960 High · 7.5 CWE-290 May 19, 2026
Spoofing issue in WebExtensions
Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
CVE-2026-8959 Critical · 9.6 CWE-20 May 19, 2026
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8958 High · 8.6 CWE-668 May 19, 2026
Information disclosure, sandbox escape in the Security: Process Sandboxing component
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8957 High · 8.8 CWE-269 May 19, 2026
Privilege escalation in the Enterprise Policies component
Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
CVE-2026-8956 Critical · 9.8 CWE-190 May 19, 2026
Integer overflow in the Networking: JAR component
Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.