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No exploitation reported

CVE-2026-118018

Spoofing issue in the Downloads component in Firefox for Android

No exploitation reported by the sources we read.

  • Published2026-10-27
  • WeaknessCWE-451

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 159.

Timeline

dates in UTC
  1. 2026-10-2714:06CVE publishedCNA

Versions per branch

Products declared by the CNA1 product

As mozilla, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Mozilla Firefox

    Not affected ≥ 159

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-27

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mozjs102Ubuntu:24.04:LTSall versions · no fixed version listedand 1 other package
  • mozjs38Ubuntu:18.04:LTSall versions · no fixed version listedand 1 other package
  • mozjs52Ubuntu:20.04:LTSall versions · no fixed version listedand 1 other package
  • mozjs78Ubuntu:22.04:LTSall versions · no fixed version listedand 3 other packages

Vendor advisories

  • CVE-2026-118018 Red Hat Product Security

    firefox: Spoofing issue in the Downloads component in Firefox for Android

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-10-27
Last Modified
2026-11-05
NVD status
Deferred
GitHub Advisory
GHSA-99x8-xf9r-wr4q

Frequently asked questions

What is CVE-2026-118018?

Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 159.

Is CVE-2026-118018 actively exploited?

Active exploitation of CVE-2026-118018 has not been confirmed. Its EPSS score was 0.1% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-118018?

CVE-2026-118018 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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