CVE-2026-100794
published 2026-09-29CVE-2026-100794: Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157…
PriorityP347critical9.6CVSS 3.1
AVNACLPRNUIRSCCHIHAH
EPSS
0.34%
25.8th percentile
Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 157 | Firefox 157 |
| 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 157 | Thunderbird 157 |
| mozilla | thunderbird | < Thunderbird 153.4 | Thunderbird 153.4 |
| mozilla | thunderbird | < Thunderbird 140.17 | Thunderbird 140.17 |
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Mozilla
Mozilla Foundation Security Advisory 2026-101: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-101: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-101
CVE: CVE-2026-100794
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 157
Mozilla
Mozilla Foundation Security Advisory 2026-97: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-97: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-97
CVE: CVE-2026-100794
Product: Firefox
Impact: low
Fixed in: Firefox 157
Mozilla
Mozilla Foundation Security Advisory 2026-103: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-103: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-103
CVE: CVE-2026-100794
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.4
Mozilla
Mozilla Foundation Security Advisory 2026-99: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-99: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-99
CVE: CVE-2026-100794
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 140.17
Mozilla
Mozilla Foundation Security Advisory 2026-100: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-100: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-100
CVE: CVE-2026-100794
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.4
Mozilla
Mozilla Foundation Security Advisory 2026-102: CVE-2026-100794
vendor_mozilla
CVE-2026-100794 Mozilla Foundation Security Advisory 2026-102: CVE-2026-100794
Mozilla Foundation Security Advisory 2026-102
CVE: CVE-2026-100794
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 140.17
GHSA
Sandbox escape due to incorrect boundary conditions in the Internationalization component.
ghsa_unreviewed·2026-09-29
CVE-2026-100794 Sandbox escape due to incorrect boundary conditions in the Internationalization component.
Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, 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=2028871https://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/mfsa2026-99/
2026-09-29
Published