CVE-2026-2768
Critical · CVSS 10.0Mozilla Firefox / Thunderbird — Sandbox escape via IndexedDB improper access control
- CVSS
- 10.0
- nvd
- EPSS
- —
- KEV
- No
- Class
- oss containerizable
- NVD-CWE-noinfo, CWE-284, CWE-693
Description
Sandbox escape in the Storage: IndexedDB component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Search profile — drives PoC discovery
Symbols IndexedDBStorage: IndexedDBmfsa2026-13mfsa2026-15mfsa2026-16mfsa2026-17bugzilla 2014101IDBDatabaseIDBObjectStoreIDBTransactionmozStorageConnectionsandbox escape
Keywords CVE-2026-2768Firefox sandbox escape IndexedDBFirefox 148 IndexedDB vulnerabilityFirefox ESR 140.8 sandbox escapeThunderbird 148 IndexedDBmfsa2026-13 PoCmfsa2026-15 PoCNVD-CWE-noinfo CWE-284 FirefoxCWE-693 Firefox sandboxIndexedDB sandbox escape exploitbugzilla 2014101 Firefox
Versions: Firefox < 148, Firefox ESR < 140.8, Thunderbird < 148, Thunderbird ESR < 140.8
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2014101
- https://www.mozilla.org/security/advisories/mfsa2026-13/
- https://www.mozilla.org/security/advisories/mfsa2026-15/
- https://www.mozilla.org/security/advisories/mfsa2026-16/
- https://www.mozilla.org/security/advisories/mfsa2026-17/
- https://access.redhat.com/errata/RHSA-2026:3338
- https://access.redhat.com/errata/RHSA-2026:3339
- https://access.redhat.com/errata/RHSA-2026:3361
- https://access.redhat.com/errata/RHSA-2026:3491
- https://access.redhat.com/errata/RHSA-2026:3492
- https://access.redhat.com/errata/RHSA-2026:3493
- https://access.redhat.com/errata/RHSA-2026:3494
Status: enriched · ingested 2026-06-30T06:00:22.000Z · profiled 2026-07-01T00:30:14.000Z