CVE-2023-4048: Debian Linux

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

An out-of-bounds read could have led to an exploitable crash when parsing HTML with DOMParser in low memory situations. This vulnerability affects Firefox < 116, Firefox ESR < 102.14, and Firefox ESR < 115.1.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only; version 12.0 only
• Mozilla Firefox: before 116.0 (fixed in 116.0); from 102.0, before 102.14 (fixed in 102.14); from 115.0, before 115.1 (fixed in 115.1)

Published 2023-08-01. Last modified 2026-06-17.