Vulnerability Database

308,926

Total vulnerabilities in the database

CVE-2020-21548

Libsixel 1.8.3 contains a heap-based buffer overflow in the sixel_encode_highcolor function in tosixel.c.

  • Published: Sep 17, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-21548
  • Severity: High
  • Exploit:

CVSS v3:

  • Severity: High
  • Score: 8.8
  • AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.8
  • AV:N/AC:M/Au:N/C:P/I:P/A:P

CWEs:

Software From Fixed in
libsixel_project / libsixel 1.8.3 1.8.3.x