What is CVE-2026-74980?

CVE-2026-74980 is a medium-severity vulnerability in Mozilla Firefox Mobile, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.5/10. Published 2026-08-18.

How severe is CVE-2026-74980?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Mozilla Firefox Mobile

CVE-2026-74980

Clickjacking issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.

Published 2026-08-18 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Mozilla Firefox Mobile

Weakness classification (CWE)

CWE-1021 — Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

References

bugzilla.mozilla.org/show_bug.cgi (Permissions Required)
www.mozilla.org/security/advisories/mfsa2026-74/ (Vendor Advisory)

Frequently asked questions

What is CVE-2026-74980?: CVE-2026-74980 is a medium-severity vulnerability in Mozilla Firefox Mobile, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 6.5/10. Published 2026-08-18.
How severe is CVE-2026-74980?: Medium severity. CVSS v3 base score is 6.5 out of 10.