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CVE-2026-118020

Use-after-free in the Layout component

CVSS score

—

EPSS probability

—

Risk score

—

Published

3 h ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Patch status has not yet been verified

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Vulnerability description

DayBreach AI Explanation

Verified against sources

CVE-2026-118020: Use-After-Free Vulnerability in Firefox Layout Component

Sources read

2

Source agreement

Tam uyum

Evidence confidence

%63

Short explanation

A use-after-free vulnerability has been identified in the Layout component of Firefox. According to official source notifications, this vulnerability was fixed in Firefox 159 [S0].

Why does it matter?

Use-after-free vulnerabilities can lead to unexpected behavior or security risks in systems due to improperly managed memory structures [S0].

What should be done?

  • Upgrade the Firefox application to supported versions [S0]
  • Monitor official security advisories [S1]
Chain of evidence and sources2 verified claims

CVE-2026-118020, Firefox uygulamasının Layout bileşeninde bir use-after-free zafiyetidir [S0].

S0 · daybreach-canonicalS1 · cvelistS2 · nvd

İlgili güvenlik açığı resmi kaynak bildirimlerine göre Firefox 159 sürümünde giderilmiştir [S0].

S0 · daybreach-canonicalS1 · cvelist
Show the technical text from the sources

Use-after-free in the Layout component. This vulnerability was fixed in Firefox 159.

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-118020 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1mozillafirefox View
Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
The sources have not yet published a verified CVSS metric.

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-118020 is associated with the following CWEs:

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')CWE-20: Improper Input Validation

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-118020 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Official Sources and Advisories

https://bugzilla.mozilla.org/show_bug.cgi?id=2075977vendor-advisoryhttps://www.mozilla.org/security/advisories/mfsa2026-118/vendor-advisory

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

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CVE-2026-118020 · Use-after-free in the Layout component