CVE-2026-8945

HIGH 7.5

Sandbox escape in Firefox and Firefox Focus for Android

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
Industries	Technology
Published	May 19, 2026
Last Updated	Jun 30, 2026

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Affected Versions

Mozilla / Firefox

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2003171 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-46/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-8945 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2479863 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8945.json

Credits

Daisuke Hatakeyama and Shota Matsuda