What is the CVSS score of CVE-2026-3845?

CVE-2026-3845 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Mozilla are affected by CVE-2026-3845?

A critical heap buffer overflow vulnerability in Firefox for Android's media playback component poses a risk to organizations where employees use this browser for work activities.

How to fix or mitigate CVE-2026-3845?

Within 24 hours: Inventory all Firefox for Android installations in your organization and communicate this vulnerability to affected users. Within 7 days: Distribute guidance to users to avoid untrusted video/audio content and consider switching to alternative browsers until patching is available. Within 30 days: Monitor Firefox release notes for version 148.0.2+ availability and establish a deployment plan for mandatory updates once the patch is released.

Mozilla CVE-2026-3845

HIGH

Heap-based Buffer Overflow (CWE-122)

2026-03-10 security@mozilla.org

Buffer Overflow Mozilla Heap Overflow Google

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Mar 10, 2026 - 18:19 nvd

HIGH 8.8

DescriptionCVE.org

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

AnalysisAI

Firefox for Android versions prior to 148.0.2 contain a heap buffer overflow in the audio/video playback component that allows remote code execution, information disclosure, and denial of service through a malicious media file requiring user interaction. The vulnerability affects all Firefox for Android users and currently lacks a publicly available patch. An attacker can achieve complete system compromise by crafting a specially crafted video or audio file that triggers the buffer overflow when played.

Technical ContextAI

Classified as CWE-122 (Heap-based Buffer Overflow). Affects Firefox. Heap buffer overflow in the Audio/Video: Playback component in Firefox for Android. This vulnerability affects Firefox < 148.0.2.

RemediationAI

Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible. Restrict network access to the affected service where possible.