CVE-2026-74986
N/A
N/A
Summary
Site isolation issue in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mozilla | Firefox | 153.1 <= 153.* | unaffected |
| Mozilla | Firefox | 154 <= * | unaffected |
| Mozilla | Thunderbird | 153.1 <= 153.* | unaffected |
| Mozilla | Thunderbird | 154 <= * | unaffected |
Weaknesses
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2060048
- https://www.mozilla.org/security/advisories/mfsa2026-74/
- https://www.mozilla.org/security/advisories/mfsa2026-77/
- https://www.mozilla.org/security/advisories/mfsa2026-78/
- https://www.mozilla.org/security/advisories/mfsa2026-80/
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