What is CVE-2026-3845?

CVE-2026-3845 is a high-severity vulnerability in Mozilla Firefox, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-10.

How severe is CVE-2026-3845?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Mozilla Firefox

CVE-2026-3845

Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability was fixed in Firefox 148.0.2.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (36.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Mozilla Firefox — versions 148.0.2

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security@mozilla.org (Permissions Required, Issue Tracking)
security@mozilla.org (Vendor Advisory)

Frequently asked questions

What is CVE-2026-3845?: CVE-2026-3845 is a high-severity vulnerability in Mozilla Firefox, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-10.
How severe is CVE-2026-3845?: High severity. CVSS v3 base score is 8.8 out of 10.