What is CVE-2026-8093?

CVE-2026-8093 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2026-05-07.

How severe is CVE-2026-8093?

High severity. CVSS v3 base score is 8.1 out of 10.

Buffer overflow in Mozilla Firefox

CVE-2026-8093

Memory safety bugs present in Firefox 150.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Fi…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (5.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mozilla Firefox — versions 150.0.2
Mozilla Thunderbird — versions 150.0.2

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Frequently asked questions

What is CVE-2026-8093?: CVE-2026-8093 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.1/10. Published 2026-05-07.
How severe is CVE-2026-8093?: High severity. CVSS v3 base score is 8.1 out of 10.