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
- Libpng
- Pnggroup Libpng — versions >= 1.0.9, < 1.6.57
- Debian Debian_linux — versions 11.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Mitigation, Vendor Advisory)
- security-advisories@github.com (Exploit, x_refsource_MISC, Mitigation, Issue Tracking)
- security-advisories@github.com (Exploit, x_refsource_MISC, Mitigation, Issue Tracking)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Patch, x_refsource_MISC)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
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.