CVE-2026-100793
published 2026-09-29CVE-2026-100793: JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
PriorityP430medium6.5CVSS 3.1
AVNACLPRNUIRSUCHINAN
EPSS
0.29%
19.9th percentile
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 157 | Firefox 157 |
| mozilla | firefox | < 157.0.0 | 157.0.0 |
| mozilla | thunderbird | < Thunderbird 157 | Thunderbird 157 |
| mozilla | thunderbird | < 157.0 | 157.0 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vendor_redhat6.5MEDIUM
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Red Hat
firefox: JIT miscompilation in the JavaScript Engine component
vendor_redhat·2026-09-29·CVSS 6.5
CVE-2026-100793 [MEDIUM] CWE-843 firefox: JIT miscompilation in the JavaScript Engine component
firefox: JIT miscompilation in the JavaScript Engine component
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
JIT miscompilation in the JavaScript Engine component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Mitigation: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/fi
Mozilla
Mozilla Foundation Security Advisory 2026-101: CVE-2026-100793
vendor_mozilla
CVE-2026-100793 Mozilla Foundation Security Advisory 2026-101: CVE-2026-100793
Mozilla Foundation Security Advisory 2026-101
CVE: CVE-2026-100793
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 157
Mozilla
Mozilla Foundation Security Advisory 2026-97: CVE-2026-100793
vendor_mozilla
CVE-2026-100793 Mozilla Foundation Security Advisory 2026-97: CVE-2026-100793
Mozilla Foundation Security Advisory 2026-97
CVE: CVE-2026-100793
Product: Firefox
Impact: low
Fixed in: Firefox 157
GHSA
JIT miscompilation in the JavaScript Engine component.
ghsa_unreviewed·2026-09-29
CVE-2026-100793 JIT miscompilation in the JavaScript Engine component.
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Firefox 157.
No detection rules found.
No public exploits indexed.
Hackernews
⚡ Weekly Recap: NetScaler and FortiMail 0-Days, AI Coding Leaks, Spectre v2 and Ransomware Arrests
blogs_hackernews·2026-10-05·CVSS 7.5
CVE-2026-88779 [HIGH] ⚡ Weekly Recap: NetScaler and FortiMail 0-Days, AI Coding Leaks, Spectre v2 and Ransomware Arrests
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Bugzilla
CVE-2026-100793 firefox: JIT miscompilation in the JavaScript Engine component
bugzilla·2026-09-29·CVSS 6.5
CVE-2026-100793 [MEDIUM] CVE-2026-100793 firefox: JIT miscompilation in the JavaScript Engine component
CVE-2026-100793 firefox: JIT miscompilation in the JavaScript Engine component
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Firefox 157.
2026-09-29
Published