CVE-2026-2787

CRITICAL 9.8CVE-2026-2787 · Published 24/02/2026 · updated 17/06/2026

Package	Affected versions	Patched versions
firefox mozilla	`≥ 128.0, < 140.8.0< 115.33.0< 148.0`	`140.8.0115.33.0148.0`
thunderbird mozilla	`< 140.8.0< 148.0`	`140.8.0148.0`

Description

Use-after-free in the DOM: Window and Location component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.

References

bugzilla.mozilla.org/show_bug.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2026-13 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-14 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-15 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-16 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-17 · Vendor Advisory

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