CVE-2026-110601
MEDIUM
CVSS 6.3
Published: 2026-10-14
Modified: 2026-10-14
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Description
libsixel before 1.8.7-r1 and 1.9.0 through 1.10.5 contains a heap out-of-bounds write vulnerability in gif_init_frame() in src/fromgif.c, which never checks the GIF transparent color index against the palette size. Attackers can supply a crafted GIF with a small color table and large transparent index, processed with a background color set, to write bytes past the palette buffer, causing heap corruption or crashes.
Quick Facts
| CVE ID | CVE-2026-110601 |
| CVSS Score | 6.3 |
| Vector | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H |
| Published | 2026-10-14 |
| Exploited | No |
| CISA KEV | No |
| PoC | Not public |
References
- https://github.com/libsixel/libsixel/blob/v1.10.5/src/fromgi…
- https://github.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.…
- https://github.com/saitoha/libsixel/commit/bdbab09816eb91884…
- https://github.com/saitoha/libsixel/issues/220
- https://github.com/saitoha/libsixel/releases/tag/v1.8.7-r1
- https://hackmd.io/@haind-pwn/libsixel-gif-transparent-index-…
- https://www.vulncheck.com/advisories/libsixel-before-1.8.7-r…