CVE-2026-34757: LIBPNG has a yse-after-free in png_set_PLTE, png_set_tRNS and png_set_hIST leading to corrupted chunk data and potential heap information disclosure
Overview
- Severity
- Medium (CVSS 5.1)
- CVSS Vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- Exploit Status
- Not Exploited
- Patch Tuesday
- 2026-Apr
- Released
- 2026-04-12
- Last Updated
- 2026-09-25
- EPSS Score
- 0.16% (percentile: 5.1%)
Affected Products (3)
Open Source Software
- azl3 libpng 1.6.56-1 on Azure Linux 3.0
- cbl2 libpng 1.6.56-1 on CBL Mariner 2.0
Other
Revision History
- 2026-04-12: Information published.
- 2026-04-13: Information published.
- 2026-04-15: Information published.
- 2026-05-03: Information published.
- 2026-05-04: Information published.
- 2026-05-19: Information published.
- 2026-06-02: Information published.
- 2026-09-25: Information published.