Updated libpng packages fix security vulnerabilities

Use-after-free via pointer aliasing in pngsettRNS and pngsetPLTE. CVE-2026-33416 Out-of-bounds read/write in the palette expansion on ARM Neon. CVE-2026-33636...

SIXEL Libsixel Encoder Heap Buffer Overflow DoS

The vulnerability of the sixeldebugprintpalette function in the src/encoder.c file of the SIXEL Libsixel encoder/decoder implementation is related to the occurrence of operations that go beyond the buffer boundaries in memory. Exploiting this vulnerability allows an attacker to compromise the...