Buffer overflow in Happyfish100 Libfastcommon
CVE-2026-2016
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.003 (18.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Happyfish100 Libfastcommon — versions 1.0.0, 1.0.1, 1.0.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/happyfish100/libfastcommon/issues/55 (issue-tracking, Exploit, Vendor Advisory)
- github.com/happyfish100/libfastcommon/issues/55 (issue-tracking, Exploit, Vendor Advisory)
- github.com/happyfish100/libfastcommon/issues/55 (issue-tracking, Exploit, exploit, Vendor Advisory)
- github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085… (Patch, patch)
- github.com/happyfish100/libfastcommon/ (Product, product)
Frequently asked questions
- What is CVE-2026-2016?
- CVE-2026-2016 is a medium-severity vulnerability in Happyfish100 Libfastcommon, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-02-06.
- How severe is CVE-2026-2016?
- Medium severity. CVSS v3 base score is 5.3 out of 10.