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CVE-2026-110601

6.3 · MEDIUM

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…

Published Oct 14, 2026CWE-787EPSS 0.24%

Overview

CVE-2026-110601 is a medium-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/libsixel/libsixel/blob/v1.10.5/src/fromgif.c#L219-L240GitHubgithub.com/saitoha/libsixel/blob/v1.8.7/src/fromgif.c#L182-L248GitHubgithub.com/saitoha/libsixel/commit/bdbab09816eb9188429c37a50b97c5e66dfe5047GitHubgithub.com/saitoha/libsixel/issues/220GitHubgithub.com/saitoha/libsixel/releases/tag/v1.8.7-r1Refhackmd.io/@haind-pwn/libsixel-gif-transparent-index-oob-writeRefwww.vulncheck.com/advisories/libsixel-before-1.8.7-r1-and-1.9.0-through-1.10.5-heap-out-of-bounds-write-via-gifGitHubgithub.com/saitoha/libsixel/issues/220

How CyberStrike helps

Frequently asked questions

What is CVE-2026-110601?

CVE-2026-110601 is a medium-severity vulnerability. It was published on October 14, 2026 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2026-110601?

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-110601?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-110601?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-110601 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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