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CVE-2026-3846

Same-origin policy bypass in the CSS Parsing and Computation component

CVSS 6.5 MEDIUMEPSS 0.1%CWE-346
Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 148.0.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products
Mozilla · Firefox

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