CVE-2026-124950

EUVD-2026-120944
Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160 and Thunderbird 160.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mozillaCNA
UNKNOWN
---
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
mozillafirefox
𝑥
< 160
CNA
mozillathunderbird
𝑥
< 160
CNA
References
https://bugzilla.mozilla.org/show_bug.cgi?id=2083733
https://www.mozilla.org/security/advisories/mfsa2026-125/
https://www.mozilla.org/security/advisories/mfsa2026-128/