Patch Forecast
Amber warning
Patch this week.

CVE-2026-100825

Use-after-free in the JavaScript Engine: JIT component

Risk score
60/100
CVSS
8.8 v3.1
Exploit chance (30 days)
0.2%
Published
29 Sep 2026

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What to know

What it is
Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Affected
Firefox
Fix
Apply the vendor's security update; see the linked advisory.
Exploitation
No known exploitation

Why it is Amber

  • CVSS 8.8 high
  • Remotely exploitable without logging in

References

Original description

Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Last activity 29 Sep 2026. Patch Forecast updates every hour.