CVE-2026-109733
published 2026-10-13CVE-2026-109733: JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird…
PriorityP343high8.1CVSS 3.1
AVNACLPRNUIRSUCHIHAN
EPSS
0.34%
26.2th percentile
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 158 | Firefox 158 |
| mozilla | firefox_esr | < Firefox ESR 115.43 | Firefox ESR 115.43 |
| mozilla | firefox_esr | < Firefox ESR 153.5 | Firefox ESR 153.5 |
| mozilla | thunderbird | < Thunderbird 158 | Thunderbird 158 |
| mozilla | thunderbird | < Thunderbird 153.5 | Thunderbird 153.5 |
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Mozilla
Mozilla Foundation Security Advisory 2026-109: CVE-2026-109733
vendor_mozilla
CVE-2026-109733 Mozilla Foundation Security Advisory 2026-109: CVE-2026-109733
Mozilla Foundation Security Advisory 2026-109
CVE: CVE-2026-109733
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 158
Mozilla
Mozilla Foundation Security Advisory 2026-107: CVE-2026-109733
vendor_mozilla
CVE-2026-109733 Mozilla Foundation Security Advisory 2026-107: CVE-2026-109733
Mozilla Foundation Security Advisory 2026-107
CVE: CVE-2026-109733
Product: Firefox ESR
Impact: moderate
Fixed in: Firefox ESR 115.43
Mozilla
Mozilla Foundation Security Advisory 2026-108: CVE-2026-109733
vendor_mozilla
CVE-2026-109733 Mozilla Foundation Security Advisory 2026-108: CVE-2026-109733
Mozilla Foundation Security Advisory 2026-108
CVE: CVE-2026-109733
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.5
Mozilla
Mozilla Foundation Security Advisory 2026-110: CVE-2026-109733
vendor_mozilla
CVE-2026-109733 Mozilla Foundation Security Advisory 2026-110: CVE-2026-109733
Mozilla Foundation Security Advisory 2026-110
CVE: CVE-2026-109733
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.5
Mozilla
Mozilla Foundation Security Advisory 2026-106: CVE-2026-109733
vendor_mozilla
CVE-2026-109733 Mozilla Foundation Security Advisory 2026-106: CVE-2026-109733
Mozilla Foundation Security Advisory 2026-106
CVE: CVE-2026-109733
Product: Firefox
Impact: low
Fixed in: Firefox 158
GHSA
JIT miscompilation in the JavaScript Engine: JIT component.
ghsa_unreviewed·2026-10-13
CVE-2026-109733 JIT miscompilation in the JavaScript Engine: JIT component.
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, and Firefox ESR 153.5.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2076269https://www.mozilla.org/security/advisories/mfsa2026-106/https://www.mozilla.org/security/advisories/mfsa2026-107/https://www.mozilla.org/security/advisories/mfsa2026-108/https://www.mozilla.org/security/advisories/mfsa2026-109/https://www.mozilla.org/security/advisories/mfsa2026-110/
2026-10-13
Published