Mozilla

Security Vulnerabilities fixed in Firefox 159.0.1

MFSA2026-123 Nov 3, 2026 Source: Vendor

Imported from Mozilla security advisory MFSA2026-123. Draft.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2026-123/

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CVE-2026-120572 BR2026-0000-042072 unclaimed

High: Incorrect boundary conditions in the Layout: Block and Inline component

Credited as Mozilla