VulnerabilityPublished 27 Oct 2026

CVE-2026-118016: Use-after-free in the DOM · Core & HTML component

Source GCVE Database

Authoritative record:CVE-2026-118016· High

Not known to be exploited.

Data as of 27 Oct 2026, 16:57 UTC

Severity

High

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

Exploitation evidence

Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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.

ghsa-65pv-f352-4j39

What to do

AI-suggested

A fix for this vulnerability is available in Firefox 159. Users and administrators should update to Firefox 159 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.

Description

CVE-2026-118016 is a use-after-free vulnerability in the DOM Core & HTML component of Firefox. This security flaw was addressed and fixed in Firefox version 159. The vulnerability is classified with high impact due to its potential to cause memory safety issues. No known exploits in the wild have been reported. Users are advised to update to Firefox 159 or later to mitigate this issue.

Impact

The use-after-free vulnerability in the DOM Core & HTML component can result in memory corruption, which may be exploited to execute arbitrary code or crash the browser, leading to denial of service. The impact is rated high by the vendor. No evidence of exploitation in the wild is currently known.

Summary

This vulnerability involves a use-after-free condition in the DOM Core & HTML component of Firefox, which can lead to memory corruption and potentially allow an attacker to execute arbitrary code or cause a denial of service. The issue was identified and fixed by Mozilla in Firefox 159. The advisory is part of a broader set of memory safety vulnerabilities fixed in the same release, all rated with high impact. No public exploit code or active exploitation has been reported for this specific CVE.

References

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