CVE-2026-100813
published 2026-09-29CVE-2026-100813: Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.
PriorityP341high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
0.23%
13.0th percentile
Invalid pointer in the JavaScript Engine: JIT 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
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vendor_redhat8.8HIGH
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: Invalid pointer in the JavaScript Engine: JIT component
vendor_redhat·2026-09-29·CVSS 8.8
CVE-2026-100813 [HIGH] CWE-763 firefox: Invalid pointer in the JavaScript Engine: JIT component
firefox: Invalid pointer in the JavaScript Engine: JIT component
Invalid pointer in the JavaScript Engine: JIT 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:
Invalid pointer 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.
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: rhe
Mozilla
Mozilla Foundation Security Advisory 2026-97: CVE-2026-100813
vendor_mozilla·CVSS 8.8
CVE-2026-100813 [HIGH] Mozilla Foundation Security Advisory 2026-97: CVE-2026-100813
Mozilla Foundation Security Advisory 2026-97
CVE: CVE-2026-100813
Product: Firefox
Impact: low
Fixed in: Firefox 157
Mozilla
Mozilla Foundation Security Advisory 2026-101: CVE-2026-100813
vendor_mozilla·CVSS 8.8
CVE-2026-100813 [HIGH] Mozilla Foundation Security Advisory 2026-101: CVE-2026-100813
Mozilla Foundation Security Advisory 2026-101
CVE: CVE-2026-100813
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 157
GHSA
Invalid pointer in the JavaScript Engine: JIT component.
ghsa_unreviewed·2026-09-29
CVE-2026-100813 [HIGH] CWE-763 Invalid pointer in the JavaScript Engine: JIT component.
Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 157.
No detection rules found.
No public exploits indexed.
2026-09-29
Published