CVE-2026-2016: HAPPYFISH100 Libfastcommon

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

A security vulnerability has been detected in happyfish100 libfastcommon up to 1.0.84. Affected by this vulnerability is the function base64_decode of the file src/base64.c. The manipulation leads to stack-based buffer overflow. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The identifier of the patch is 82f66af3e252e3e137dba0c3891570f085e79adf. Applying a patch is the recommended action to fix this issue.

Affected products

• HAPPYFISH100 Libfastcommon: up to and including 1.0.84

Published 2026-02-06. Last modified 2026-06-17.