VulnerabilityPublished 27 Oct 2026

CVE-2026-117937: Invalid Pointer

Source GCVE Database

Authoritative record:CVE-2026-117937· High

Not known to be exploited.

Data as of 27 Oct 2026, 17:28 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-vg8h-qr8v-p42c

What to do

AI-suggested

Users and administrators should update Firefox to version 159 or later, or to Firefox ESR versions 115.44 or 153.6 or later, where this vulnerability has been fixed. Applying these official fixes fully mitigates the risk from this vulnerability.

Description

CVE-2026-117937 is a high-impact vulnerability involving an invalid pointer in the JavaScript Engine component of Firefox. This flaw was addressed and fixed in Firefox 159 and the corresponding ESR releases 115.44 and 153.6. The vulnerability could potentially lead to memory safety issues, but no active exploitation has been reported.

Impact

The vulnerability poses a high impact due to the invalid pointer in the JavaScript Engine, which could lead to memory safety violations such as crashes or potential code execution. However, there are no known active exploits in the wild targeting this flaw at this time.

Summary

This vulnerability is an invalid pointer issue within the JavaScript Engine component of Firefox. It was fixed in Firefox 159 and Firefox ESR versions 115.44 and 153.6. The Mozilla advisory classifies the impact as high. The advisory is part of a broader set of memory safety vulnerabilities fixed in the same release cycle. No known exploits in the wild have been reported for this specific CVE.

References

Community reviews

Loading reviews…