Use After Free in Libpng

CVE-2026-34757

LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. From 1.0.9 to before 1.6.57, passing a pointer obtained from png_get_PLTE, png_get_tRNS, or png_get…

Vulnerability class: Use-After-Free

EPSS: 0.000 (0.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-34757?
CVE-2026-34757 is a medium-severity vulnerability in Libpng, classified under Use After Free. CVSS score: 5.1/10. Published 2026-04-09.
How severe is CVE-2026-34757?
Medium severity. CVSS v3 base score is 5.1 out of 10.