CVE-2026-110601: saitoha libsixel Out-of-bounds Write
Vulnerability summary
CVE-2026-110601 is a medium (CVSS 6.3) Out-of-bounds Write vulnerability in saitoha libsixel. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.3% of scored vulnerabilities.
Timeline
- 14-10-2026PublishedVulnerability first disclosed.
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.
CVSS metrics
7 scores · 4 sources · 2 versions- NVDNIST5.8MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · UbuntuEcosystem advisory · calculated5.8MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
- NVDNIST6.3MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
- OSV · DebianEcosystem advisory · calculated6.3MediumCVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H
EPSS trend
Probability
0.17%
Chance of exploitation in the next 30 days
Percentile
6%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian1 product
- libsixelAll versions (No fix recorded) | < 1:1.8.7-r2-1
Saitoha1 product
- libsixel< 1.8.7-r1 | ≥ 1.9.0, ≤ 1.10.5
Ubuntu1 product
- libsixelAll versions (No fix recorded)
3 vendors · 3 products
