CVE-2026-117898
published 2026-10-27CVE-2026-117898: Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
PriorityP427high7.5
EPSS
0.18%
7.7th percentile
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 159 | Firefox 159 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < Firefox ESR 153.6 | Firefox ESR 153.6 |
| mozilla | thunderbird | < Thunderbird 159 | Thunderbird 159 |
| mozilla | thunderbird | < Thunderbird 153.6 | Thunderbird 153.6 |
| rhel10 | firefox-flatpak | — | — |
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Red Hat
firefox: Use-after-free in the JavaScript Engine: JIT component
vendor_redhat·2026-10-27·CVSS 7.5
CVE-2026-117898 [HIGH] CWE-825 firefox: Use-after-free in the JavaScript Engine: JIT component
firefox: Use-after-free in the JavaScript Engine: JIT component
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Use-after-free in the JavaScript Engine: JIT component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red Hat
Mozilla
Mozilla Foundation Security Advisory 2026-121: CVE-2026-117898
vendor_mozilla
CVE-2026-117898 Mozilla Foundation Security Advisory 2026-121: CVE-2026-117898
Mozilla Foundation Security Advisory 2026-121
CVE: CVE-2026-117898
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 159
Mozilla
Mozilla Foundation Security Advisory 2026-122: CVE-2026-117898
vendor_mozilla
CVE-2026-117898 Mozilla Foundation Security Advisory 2026-122: CVE-2026-117898
Mozilla Foundation Security Advisory 2026-122
CVE: CVE-2026-117898
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 153.6
Mozilla
Mozilla Foundation Security Advisory 2026-118: CVE-2026-117898
vendor_mozilla
CVE-2026-117898 Mozilla Foundation Security Advisory 2026-118: CVE-2026-117898
Mozilla Foundation Security Advisory 2026-118
CVE: CVE-2026-117898
Product: Firefox
Impact: low
Fixed in: Firefox 159
Mozilla
Mozilla Foundation Security Advisory 2026-120: CVE-2026-117898
vendor_mozilla
CVE-2026-117898 Mozilla Foundation Security Advisory 2026-120: CVE-2026-117898
Mozilla Foundation Security Advisory 2026-120
CVE: CVE-2026-117898
Product: Firefox ESR
Impact: low
Fixed in: Firefox ESR 153.6
GHSA
Use-after-free in the JavaScript Engine: JIT component.
ghsa_unreviewed·2026-10-27
CVE-2026-117898 Use-after-free in the JavaScript Engine: JIT component.
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.
No detection rules found.
No public exploits indexed.
2026-10-27
Published