CVE-2008-3964: Libpng

Medium severity, CVSS 4.3. EPSS: 3.3% chance of exploitation in the next 30 days.

Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c.

Affected products

• Libpng Libpng: before 1.2.32 (fixed in 1.2.32); version 1.4.0 only

Published 2008-09-11. Last modified 2026-06-16.