What’s Vulnerable › Vulnerabilities

CVE-2019-20056

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-12-29 · updated 2026-06-17
• Weakness: CWE-617

Description

stb_image.h (aka the stb image loader) 2.23, as used in libsixel and other products, has an assertion failure in stbi__shiftsigned.

Affected products

• nothings stb: 2.23

References

• https://github.com/saitoha/libsixel/issues/126
• https://github.com/saitoha/libsixel/issues/126

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