VulnerabilityPublished 10 Nov 2026

CVE-2026-124946: Mozilla Firefox · Invalid pointer in the JavaScript Engine: JIT component

Affects Mozilla FirefoxSource CVE Database V5

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Not known to be exploited.

Data as of 10 Nov 2026, 13:36 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

AI-suggested

Mozilla has released an official fix for this vulnerability in Firefox version 160. Users and administrators should update to Firefox 160 or later to remediate this issue. No additional mitigation steps are necessary as the vulnerability is fully addressed by the update.

Description

CVE-2026-124946 is a vulnerability involving an invalid pointer in the JavaScript Engine's Just-In-Time (JIT) compilation component of Mozilla Firefox. This security flaw was addressed and fixed in Firefox version 160. The vulnerability is classified with high impact severity by Mozilla. No public exploit or active exploitation in the wild has been reported. The vendor advisory confirms the fix and recommends updating to Firefox 160 to remediate the issue.

Impact

The vulnerability has a high impact rating according to Mozilla's advisory, indicating it could potentially be exploited to compromise the security of affected Firefox installations. However, there is no evidence of active exploitation in the wild. The flaw relates to invalid pointer usage in the JIT component, which could lead to memory corruption or execution of unintended code.

Summary

This vulnerability, identified as CVE-2026-124946, concerns an invalid pointer error within the JavaScript Engine's JIT component in Mozilla Firefox. Such a flaw could potentially lead to memory corruption or other unintended behavior. Mozilla has fixed this issue in Firefox 160, as documented in their security advisory MFSA 2026-125. The advisory categorizes the impact as high but does not provide further technical exploitation details. No known exploits in the wild have been reported.

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 10 Nov 2026, 13:36 UTC

Technical details

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