Question 1

What is CVE-2026-74986 — CVE-2026-74986?

Accepted Answer

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.

Question 2

What is the authoritative source for CVE-2026-74986?

Accepted Answer

CVE-2026-74986 (CVE-2026-74986) is catalogued in NVD + CISA KEV + FIRST EPSS and curated for EU compliance use cases by SQUR.

CVE-2026-74986CVE-2026-74986

Description

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