CVE-2026-3846

Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 148.0.2.

Score

CVSS 3.1 6.5 Medium

Status

Modified - security@mozilla.org

Published

2026-03-10

Last modified

2026-04-13

Weaknesses

CWE-346

Affected products

• Firefox (Mozilla)

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2018400
• https://www.mozilla.org/security/advisories/mfsa2026-19/