What’s Vulnerable › Vulnerabilities
CVE-2020-21677
- 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: 2021-08-10 · updated 2026-06-17
- Weakness: CWE-787
Description
A heap-based buffer overflow in the sixel_encoder_output_without_macro function in encoder.c of Libsixel 1.8.4 allows attackers to cause a denial of service (DOS) via converting a crafted PNG file into Sixel format.
Affected products
- saitoha libsixel: 1.8.4
References
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