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high advisory

Libsixel Use-After-Free Vulnerability (CVE-2026-33018)

A use-after-free vulnerability exists in libsixel versions 1.8.7 and prior when processing animated GIFs due to improper frame buffer management, potentially leading to code execution.

libsixel use-after-free CVE-2026-33018 gif
2r 1t 1c
high advisory

Libsixel Integer Overflow Vulnerability in img2sixel --crop Option

Libsixel versions 1.8.7 and prior contain an integer overflow vulnerability in the `--crop` option of `img2sixel`, leading to an out-of-bounds heap read, potentially causing a crash and information disclosure.

Libsixel +1 integer-overflow heap-read cve-2026-33019
2r 2t 1c