CVE-2026-100769
Use-after-free in the JavaScript: WebAssembly component
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
Use-after-free in the JavaScript: WebAssembly 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.
| Vendor | mozilla |
| Product | thunderbird |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 29, 2026 |
| Last Updated | Sep 30, 2026 |
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Affected Versions
Mozilla / Thunderbird
All versions affected Mozilla / Firefox
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2067190 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-100/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-101/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-102/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-103/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-97/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-99/
Credits
Tomer Fichman