by Kastro
Paper/Archive/CVE-2026-2787

CVE-2026-2787

Mozilla Firefox — Use-after-free in the DOM: Window and Location component

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 50.8.508 × 2010.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory115.33CNA
Thunderbirdsee advisory140.8CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2014560refmozilla.org/security/advisories/mfsa2026-13refmozilla.org/security/advisories/mfsa2026-14refmozilla.org/security/advisories/mfsa2026-15refmozilla.org/security/advisories/mfsa2026-16refmozilla.org/security/advisories/mfsa2026-17