MEDIUM 5.1 Microsoft
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
Microsoft Security Update 2026-Apr: 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
Affected Products
- azl3 libpng 1.6.56-1 on Azure Linux 3.0
- cbl2 libpng 1.6.56-1 on CBL Mariner 2.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34757
- https://nvd.nist.gov/vuln/detail/CVE-2026-34757
This medium severity vulnerability with a CVSS score of 5.1 was published on 2026-04-14 via Microsoft. Affected: azl3 libpng 1.6.56-1 on Azure Linux 3.0, cbl2 libpng 1.6.56-1 on CBL Mariner 2.0.
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