CVE database

94,291 vulnerabilities, newest first. Each page breaks the severity score down in plain language and lists affected versions, exploitation status and the fix.

8.8 High severity
Firefox: Use After Free
CVE-2026-117932Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117931Oct 27, 2026Mozilla
Use-after-free in the DOM: Events component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117930Oct 27, 2026Mozilla
Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117929Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.1 High severity
Firefox: Origin Validation Error
CVE-2026-117928Oct 27, 2026Mozilla
Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.1 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117926Oct 27, 2026Mozilla
Incorrect boundary conditions in the SVG component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117925Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117922Oct 27, 2026Mozilla
Use-after-free in the Networking: WebSockets component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117921Oct 27, 2026Mozilla
Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
9.6 Critical severity
Firefox: Use After Free
CVE-2026-117920Oct 27, 2026Mozilla
Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117919Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117918Oct 27, 2026Mozilla
Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
9.8 Critical severity
Firefox: Access of Uninitialized Pointer
CVE-2026-117917Oct 27, 2026Mozilla
Invalid pointer in the Graphics: WebRender component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117915Oct 27, 2026Mozilla
Incorrect boundary conditions in the Layout: Block and Inline component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.1 High severity
Firefox: Origin Validation Error
CVE-2026-117912Oct 27, 2026Mozilla
Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Access of Uninitialized Pointer
CVE-2026-117910Oct 27, 2026Mozilla
Invalid pointer in the JavaScript Engine component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117904Oct 27, 2026Mozilla
Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117901Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117900Oct 27, 2026Mozilla
Use-after-free in the DOM: Editor component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117899Oct 27, 2026Mozilla
Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117897Oct 27, 2026Mozilla
Incorrect boundary conditions in the Layout: Tables component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Use After Free
CVE-2026-117892Oct 27, 2026Mozilla
Privilege escalation due to use-after-free in the WebRTC: Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Use After Free
CVE-2026-117891Oct 27, 2026Mozilla
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Access of Resource Using Incompatible Type
CVE-2026-117890Oct 27, 2026Mozilla
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117889Oct 27, 2026Mozilla
Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117887Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.1 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117886Oct 27, 2026Mozilla
Incorrect boundary conditions in the Graphics: Text component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117884Oct 27, 2026Mozilla
Use-after-free in the Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117883Oct 27, 2026Mozilla
Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117881Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117879Oct 27, 2026Mozilla
Incorrect boundary conditions in the Layout: Tables component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.1 High severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117873Oct 27, 2026Mozilla
Incorrect boundary conditions in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117872Oct 27, 2026Mozilla
Use-after-free in the JavaScript: Standard Library component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Use After Free
CVE-2026-117870Oct 27, 2026Mozilla
Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
8.8 High severity
Firefox: Use After Free
CVE-2026-117869Oct 27, 2026Mozilla
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
9.6 Critical severity
Firefox: Protection Mechanism Failure
CVE-2026-117868Oct 27, 2026Mozilla
Sandbox escape in the DOM: Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Use After Free
CVE-2026-117867Oct 27, 2026Mozilla
Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
7.3 High severity
Firefox: Use After Free
CVE-2026-117866Oct 27, 2026Mozilla
Privilege escalation due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
9.8 Critical severity
Firefox: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVE-2026-117862Oct 27, 2026Mozilla
Privilege escalation due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
9.6 Critical severity
Firefox: Protection Mechanism Failure
CVE-2026-117861Oct 27, 2026Mozilla
Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.