Firefox <148 / ESR <115.33, <140.8 Undefined Behavior in DOM (CVE2026-2771)
CVE-2026-2771 Published on February 24, 2026
Undefined behavior in the DOM: Core & HTML component
Undefined behavior in the DOM: Core & HTML component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Products Associated with CVE-2026-2771
You can be notified by email with stack.watch whenever vulnerabilities like CVE-2026-2771 are published in these products:
Affected Versions
Mozilla Firefox:- Version unspecified and below 148 is affected.
- Version unspecified and below 115.33 is affected.
- Version unspecified and below 140.8 is affected.
- Version unspecified and below 148 is affected.
- Version unspecified and below 140.8 is affected.