happyfish100 libfastcommon base64.c base64_decode stack-based overflow
Summary
| CVE | CVE-2026-2016 |
|---|---|
| State | PUBLISHED |
| Assigner | VulDB |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-02-06 12:16:26 UTC |
| Updated | 2026-04-29 01:00:01 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v4.0 1.9 LOW from [email protected]
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-119 | CWE-121 | CWE-787 | CWE-121 Stack-based Buffer Overflow | CWE-119 Memory Corruption
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 1.9 | LOW | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/C... |
| 4.0 | CNA | DECLARED | 4.8 | MEDIUM | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P |
| 3.1 | [email protected] | Primary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | [email protected] | Secondary | 5.3 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
| 3.1 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| 3.0 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C |
| 2.0 | [email protected] | Secondary | 4.3 | AV:L/AC:L/Au:S/C:P/I:P/A:P | |
| 2.0 | CNA | DECLARED | 4.3 | AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C |
CVSS v4.0 Breakdown
Attack Vector
LocalAttack Complexity
LowAttack Requirements
NonePrivileges Required
LowUser Interaction
NoneConfidentiality
LowIntegrity
LowAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v3.0 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
LowAvailability
LowCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Happyfish100 | Libfastcommon | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Happyfish100 | Libfastcommon | affected 1.0.0 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.1 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.2 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.3 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.4 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.5 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.6 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.7 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.8 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.9 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.10 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.11 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.12 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.13 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.14 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.15 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.16 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.17 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.18 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.19 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.20 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.21 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.22 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.23 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.24 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.25 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.26 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.27 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.28 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.29 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.30 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.31 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.32 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.33 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.34 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.35 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.36 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.37 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.38 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.39 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.40 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.41 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.42 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.43 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.44 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.45 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.46 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.47 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.48 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.49 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.50 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.51 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.52 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.53 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.54 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.55 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.56 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.57 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.58 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.59 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.60 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.61 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.62 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.63 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.64 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.65 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.66 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.67 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.68 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.69 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.70 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.71 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.72 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.73 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.74 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.75 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.76 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.77 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.78 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.79 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.80 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.81 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.82 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.83 | Not specified |
| CNA | Happyfish100 | Libfastcommon | affected 1.0.84 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/happyfish100/libfastcommon/issues/55 | [email protected] | github.com | Exploit, Vendor Advisory |
| github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891... | [email protected] | github.com | Patch |
| vuldb.com | [email protected] | vuldb.com | Permissions Required, VDB Entry |
| github.com/happyfish100/libfastcommon/issues/55 | [email protected] | github.com | Exploit, Vendor Advisory |
| github.com/happyfish100/libfastcommon | [email protected] | github.com | Product |
| vuldb.com | [email protected] | vuldb.com | Third Party Advisory, VDB Entry |
| vuldb.com | [email protected] | vuldb.com | Third Party Advisory, VDB Entry |
| github.com/happyfish100/libfastcommon/issues/55 | [email protected] | github.com | Exploit, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: liloler (VulDB User) (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-02-05T00:00:00.000Z | Advisory disclosed |
| CNA | 2026-02-05T01:00:00.000Z | VulDB entry created |
| CNA | 2026-02-18T01:03:36.000Z | VulDB entry last update |
There are currently no legacy QID mappings associated with this CVE.