Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefo…

Critical CVSS 9.6

CVECVE-2026-100758

First seen2026-10-14 01:15 UTC

Disclosed2026-09-29 13:17 UTC

Last updated2026-10-14 01:15 UTC

Channel statusauto

Summary

Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.

In-depth triage

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

Sources

NVD DATABASE

Original Links

https://bugzilla.mozilla.org/show_bug.cgi?id=2049792 Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-100/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-101/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-102/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-103/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-97/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-98/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-99/ Vendor Advisory

Timeline

2026-10-14 nvd_ingest NVD