What’s Vulnerable › Vulnerabilities

CVE-2026-100823: Spoofing issue in the Downloads component in Firefox for Android

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-09-29 · updated 2026-10-05
• Weakness: CWE-451

Description

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

Affected products

• Mozilla Firefox for Android: before 157.0 — fixed in 157.0

How to fix

Upgrade to a fixed version: Mozilla Firefox for Android 157.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=2054384
• https://www.mozilla.org/security/advisories/mfsa2026-97/

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