PT-2026-6717 · Unknown · Libfastcommon

Liloler · Published 2026-02-06 · Updated 2026-02-06 · CVE-2026-2016

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions happyfish100 libfastcommon versions up to 1.0.84

Description A security issue exists in happyfish100 libfastcommon up to version 1.0.84. The base64 decode function within the src/base64.c file is susceptible to a stack-based buffer overflow. Local access is required for exploitation. The exploit for this issue has been publicly disclosed.

Recommendations Apply the patch with identifier 82f66af3e252e3e137dba0c3891570f085e79adf to resolve the issue.

Exploit

Fix

Buffer Overflow

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-121

CWE-787

Related Identifiers

CVE-2026-2016

Affected Products

Libfastcommon

References · 14

• 🔥 https://github.com/happyfish100/libfastcommon/issues/55#issue-3836362577 · Exploit
• https://github.com/happyfish100/libfastcommon/issues/55#issuecomment-3776757848 · Vendor Advisory
• https://github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085e79adf · Patch
• https://github.com/happyfish100/libfastcommon/issues/55 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2016 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2016 · Vendor Advisory
• https://twitter.com/CVEnew/status/2019737915731890625 · Twitter Post
• https://t.me/CVEtracker/43936 · Telegram Post
• https://vuldb.com/?id.344598 · Note
• https://vuldb.com/?ctiid.344598 · Note
• https://t.me/cveNotify/151120 · Telegram Post
• https://twitter.com/VulmonFeeds/status/2019810395737694722 · Twitter Post
• https://vuldb.com/?submit.743873 · Note
• https://github.com/happyfish100/libfastcommon · Note