happyfish100 libfastcommon base64.c base64_decode stack-based overflow
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| happyfish100 | libfastcommon | 1.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18; 1.0.19; 1.0.20; 1.0.21; 1.0.22; 1.0.23; 1.0.24; 1.0.25; 1.0.26; 1.0.27; 1.0.28; 1.0.29; 1.0.30; 1.0.31; 1.0.32; 1.0.33; 1.0.34; 1.0.35; 1.0.36; 1.0.37; 1.0.38; 1.0.39; 1.0.40; 1.0.41; 1.0.42; 1.0.43; 1.0.44; 1.0.45; 1.0.46; 1.0.47; 1.0.48; 1.0.49; 1.0.50; 1.0.51; 1.0.52; 1.0.53; 1.0.54; 1.0.55; 1.0.56; 1.0.57; 1.0.58; 1.0.59; 1.0.60; 1.0.61; 1.0.62; 1.0.63; 1.0.64; 1.0.65; 1.0.66; 1.0.67; 1.0.68; 1.0.69; 1.0.70; 1.0.71; 1.0.72; 1.0.73; 1.0.74; 1.0.75; 1.0.76; 1.0.77; 1.0.78; 1.0.79; 1.0.80; 1.0.81; 1.0.82; 1.0.83; 1.0.84 | — | No fix listed | CNA |
- libfastcommon Vendorhappyfish100 Affected 1.0.0; 1.0.1; 1.0.2; 1.0.3; 1.0.4; 1.0.5; 1.0.6; 1.0.7; 1.0.8; 1.0.9; 1.0.10; 1.0.11; 1.0.12; 1.0.13; 1.0.14; 1.0.15; 1.0.16; 1.0.17; 1.0.18; 1.0.19; 1.0.20; 1.0.21; 1.0.22; 1.0.23; 1.0.24; 1.0.25; 1.0.26; 1.0.27; 1.0.28; 1.0.29; 1.0.30; 1.0.31; 1.0.32; 1.0.33; 1.0.34; 1.0.35; 1.0.36; 1.0.37; 1.0.38; 1.0.39; 1.0.40; 1.0.41; 1.0.42; 1.0.43; 1.0.44; 1.0.45; 1.0.46; 1.0.47; 1.0.48; 1.0.49; 1.0.50; 1.0.51; 1.0.52; 1.0.53; 1.0.54; 1.0.55; 1.0.56; 1.0.57; 1.0.58; 1.0.59; 1.0.60; 1.0.61; 1.0.62; 1.0.63; 1.0.64; 1.0.65; 1.0.66; 1.0.67; 1.0.68; 1.0.69; 1.0.70; 1.0.71; 1.0.72; 1.0.73; 1.0.74; 1.0.75; 1.0.76; 1.0.77; 1.0.78; 1.0.79; 1.0.80; 1.0.81; 1.0.82; 1.0.83; 1.0.84 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:happyfish100:libfastcommon:*:*:*:*:*:*:*:* | up to 1.0.84 | Vulnerable | happyfish100 |
- cpe:2.3:a:happyfish100:libfastcommon:*:*:*:*:*:*:*:* Versions up to 1.0.84 Vulnerable ·happyfish100
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-2016
- 2026-10-03 Alias added: GHSA-v5g8-2q7f-c524
References
Exploit 3
Patch 1
Sources
- CVE-2026-2016 · CVE Program
- CVE-2026-2016 · NVD
- FIRST EPSS
- GHSA-v5g8-2q7f-c524 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences