CVE-2026-44638
2.5 · LOWOverview
CVE-2026-44638 is a low-severity vulnerability affecting saitoha libsixel. It was published on May 14, 2026 and has a CVSS 3.1 base score of 2.5 (LOW).
This vulnerability has a CVSS 3.1 base score of 2.5, rated LOW. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical Description
libsixel is a SIXEL encoder/decoder implementation derived from kmiya's sixel. From to 1.8.7-r1, a wrong NULL check after an allocation call in sixel_decode_raw and sixel_decode causes a NULL pointer dereference whenever the allocation fails. The check tests the address of the output parameter (always non-NULL) instead of the value the malloc returned. On allocation failure, the function continues and writes through a NULL pointer, crashing the process. This is a denial of service against any caller of these public APIs that hits a low-memory condition. This vulnerability is fixed in 1.8.7-r2.
Remediation
Check the references section for vendor advisories and patches from saitoha. Update libsixel to the latest patched version. 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.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| saitoha | libsixel | >= 1.0.0, < 1.8.7-r2 | Affected |
Frequently Asked Questions
What is CVE-2026-44638?
CVE-2026-44638 is a low-severity vulnerability affecting saitoha libsixel. It was published on May 14, 2026 and has a CVSS 3.1 base score of 2.5 (LOW).
How severe is CVE-2026-44638?
This vulnerability has a CVSS 3.1 base score of 2.5, rated LOW. 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-2026-44638?
Check the references section for vendor advisories and patches from saitoha. Update libsixel to the latest patched version. 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-2026-44638?
CyberStrike's AI-powered security agents can automatically detect CVE-2026-44638 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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