CVE-2026-100758
published 2026-09-29CVE-2026-100758: Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4…
PriorityP347critical9.6CVSS 3.1
AVNACLPRNUIRSCCHIHAH
EPSS
0.32%
23.5th percentile
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.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 157 | Firefox 157 |
| mozilla | firefox_esr | < Firefox ESR 115.42 | Firefox ESR 115.42 |
| mozilla | firefox_esr | < Firefox ESR 140.17 | Firefox ESR 140.17 |
| mozilla | firefox_esr | < Firefox ESR 153.4 | Firefox ESR 153.4 |
| mozilla | thunderbird | < Thunderbird 140.17 | Thunderbird 140.17 |
| mozilla | thunderbird | < Thunderbird 153.4 | Thunderbird 153.4 |
| mozilla | thunderbird | < Thunderbird 157 | Thunderbird 157 |
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Mozilla
Mozilla Foundation Security Advisory 2026-98: CVE-2026-100758
vendor_mozilla
CVE-2026-100758 Mozilla Foundation Security Advisory 2026-98: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-98
CVE: CVE-2026-100758
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 115.42
Mozilla
Mozilla Foundation Security Advisory 2026-102: CVE-2026-100758
vendor_mozilla·CVSS 9.6
CVE-2026-100758 [CRITICAL] Mozilla Foundation Security Advisory 2026-102: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-102
CVE: CVE-2026-100758
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 140.17
Mozilla
Mozilla Foundation Security Advisory 2026-97: CVE-2026-100758
vendor_mozilla
CVE-2026-100758 Mozilla Foundation Security Advisory 2026-97: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-97
CVE: CVE-2026-100758
Product: Firefox
Impact: low
Fixed in: Firefox 157
Mozilla
Mozilla Foundation Security Advisory 2026-99: CVE-2026-100758
vendor_mozilla
CVE-2026-100758 Mozilla Foundation Security Advisory 2026-99: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-99
CVE: CVE-2026-100758
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.17
Mozilla
Mozilla Foundation Security Advisory 2026-103: CVE-2026-100758
vendor_mozilla·CVSS 9.6
CVE-2026-100758 [CRITICAL] Mozilla Foundation Security Advisory 2026-103: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-103
CVE: CVE-2026-100758
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.4
Mozilla
Mozilla Foundation Security Advisory 2026-101: CVE-2026-100758
vendor_mozilla·CVSS 9.6
CVE-2026-100758 [CRITICAL] Mozilla Foundation Security Advisory 2026-101: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-101
CVE: CVE-2026-100758
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 157
Mozilla
Mozilla Foundation Security Advisory 2026-100: CVE-2026-100758
vendor_mozilla
CVE-2026-100758 Mozilla Foundation Security Advisory 2026-100: CVE-2026-100758
Mozilla Foundation Security Advisory 2026-100
CVE: CVE-2026-100758
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.4
GHSA
Sandbox escape in the DOM: Navigation component.
ghsa_unreviewed·2026-09-29
CVE-2026-100758 [CRITICAL] CWE-284 Sandbox escape in the DOM: Navigation component.
Sandbox escape in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2049792https://www.mozilla.org/security/advisories/mfsa2026-100/https://www.mozilla.org/security/advisories/mfsa2026-101/https://www.mozilla.org/security/advisories/mfsa2026-102/https://www.mozilla.org/security/advisories/mfsa2026-103/https://www.mozilla.org/security/advisories/mfsa2026-97/https://www.mozilla.org/security/advisories/mfsa2026-98/https://www.mozilla.org/security/advisories/mfsa2026-99/
2026-09-29
Published