Vulnerability in Mozilla Firefox

[ Description ]Official description

Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• CERT-FR30 Sep 2026CERTFR-2026-AVI-1240

  Multiple vulnerabilities in Mozilla products Translated from French

  Multiple vulnerabilities have been discovered in Mozilla products. Some of them allow an attacker to cause privilege escalation, remote denial of service and a breach of data confidentiality.

  CVE-2026-100786CVE-2026-100763CVE-2026-100796+75 more CVEs
• BSI CERT-Bund29 Sep 2026WID-SEC-2026-3654

  Mozilla Firefox, Firefox ESR and Thunderbird: Multiple vulnerabilities Translated from German

  CVE-2026-100798CVE-2026-100831CVE-2026-100764+75 more CVEs

[ References ]References

• bugzilla.mozilla.org/show_bug.cgiExploitIssue TrackingMitigation
• www.mozilla.org/security/advisories/mfsa2026-97Vendor Advisory