FKIE_CVE-2026-2016
Vulnerability from fkie_nvd - Published: 2026-02-06 12:16 - Updated: 2026-06-17 10:30
Severity
5.3 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/
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.
References
| URL | Tags | ||
|---|---|---|---|
| cna@vuldb.com | https://github.com/happyfish100/libfastcommon/ | Product | |
| cna@vuldb.com | https://github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085e79adf | Patch | |
| cna@vuldb.com | https://github.com/happyfish100/libfastcommon/issues/55 | Exploit, Vendor Advisory | |
| cna@vuldb.com | https://github.com/happyfish100/libfastcommon/issues/55#issue-3836362577 | Exploit, Vendor Advisory | |
| cna@vuldb.com | https://github.com/happyfish100/libfastcommon/issues/55#issuecomment-3776757848 | Exploit, Vendor Advisory | |
| cna@vuldb.com | https://vuldb.com/?ctiid.344598 | Permissions Required, VDB Entry | |
| cna@vuldb.com | https://vuldb.com/?id.344598 | Third Party Advisory, VDB Entry | |
| cna@vuldb.com | https://vuldb.com/?submit.743873 | Third Party Advisory, VDB Entry |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| happyfish100 | libfastcommon | * |
{
"affected": [
{
"affectedData": [
{
"product": "libfastcommon",
"vendor": "happyfish100",
"versions": [
{
"status": "affected",
"version": "1.0.0"
},
{
"status": "affected",
"version": "1.0.1"
},
{
"status": "affected",
"version": "1.0.2"
},
{
"status": "affected",
"version": "1.0.3"
},
{
"status": "affected",
"version": "1.0.4"
},
{
"status": "affected",
"version": "1.0.5"
},
{
"status": "affected",
"version": "1.0.6"
},
{
"status": "affected",
"version": "1.0.7"
},
{
"status": "affected",
"version": "1.0.8"
},
{
"status": "affected",
"version": "1.0.9"
},
{
"status": "affected",
"version": "1.0.10"
},
{
"status": "affected",
"version": "1.0.11"
},
{
"status": "affected",
"version": "1.0.12"
},
{
"status": "affected",
"version": "1.0.13"
},
{
"status": "affected",
"version": "1.0.14"
},
{
"status": "affected",
"version": "1.0.15"
},
{
"status": "affected",
"version": "1.0.16"
},
{
"status": "affected",
"version": "1.0.17"
},
{
"status": "affected",
"version": "1.0.18"
},
{
"status": "affected",
"version": "1.0.19"
},
{
"status": "affected",
"version": "1.0.20"
},
{
"status": "affected",
"version": "1.0.21"
},
{
"status": "affected",
"version": "1.0.22"
},
{
"status": "affected",
"version": "1.0.23"
},
{
"status": "affected",
"version": "1.0.24"
},
{
"status": "affected",
"version": "1.0.25"
},
{
"status": "affected",
"version": "1.0.26"
},
{
"status": "affected",
"version": "1.0.27"
},
{
"status": "affected",
"version": "1.0.28"
},
{
"status": "affected",
"version": "1.0.29"
},
{
"status": "affected",
"version": "1.0.30"
},
{
"status": "affected",
"version": "1.0.31"
},
{
"status": "affected",
"version": "1.0.32"
},
{
"status": "affected",
"version": "1.0.33"
},
{
"status": "affected",
"version": "1.0.34"
},
{
"status": "affected",
"version": "1.0.35"
},
{
"status": "affected",
"version": "1.0.36"
},
{
"status": "affected",
"version": "1.0.37"
},
{
"status": "affected",
"version": "1.0.38"
},
{
"status": "affected",
"version": "1.0.39"
},
{
"status": "affected",
"version": "1.0.40"
},
{
"status": "affected",
"version": "1.0.41"
},
{
"status": "affected",
"version": "1.0.42"
},
{
"status": "affected",
"version": "1.0.43"
},
{
"status": "affected",
"version": "1.0.44"
},
{
"status": "affected",
"version": "1.0.45"
},
{
"status": "affected",
"version": "1.0.46"
},
{
"status": "affected",
"version": "1.0.47"
},
{
"status": "affected",
"version": "1.0.48"
},
{
"status": "affected",
"version": "1.0.49"
},
{
"status": "affected",
"version": "1.0.50"
},
{
"status": "affected",
"version": "1.0.51"
},
{
"status": "affected",
"version": "1.0.52"
},
{
"status": "affected",
"version": "1.0.53"
},
{
"status": "affected",
"version": "1.0.54"
},
{
"status": "affected",
"version": "1.0.55"
},
{
"status": "affected",
"version": "1.0.56"
},
{
"status": "affected",
"version": "1.0.57"
},
{
"status": "affected",
"version": "1.0.58"
},
{
"status": "affected",
"version": "1.0.59"
},
{
"status": "affected",
"version": "1.0.60"
},
{
"status": "affected",
"version": "1.0.61"
},
{
"status": "affected",
"version": "1.0.62"
},
{
"status": "affected",
"version": "1.0.63"
},
{
"status": "affected",
"version": "1.0.64"
},
{
"status": "affected",
"version": "1.0.65"
},
{
"status": "affected",
"version": "1.0.66"
},
{
"status": "affected",
"version": "1.0.67"
},
{
"status": "affected",
"version": "1.0.68"
},
{
"status": "affected",
"version": "1.0.69"
},
{
"status": "affected",
"version": "1.0.70"
},
{
"status": "affected",
"version": "1.0.71"
},
{
"status": "affected",
"version": "1.0.72"
},
{
"status": "affected",
"version": "1.0.73"
},
{
"status": "affected",
"version": "1.0.74"
},
{
"status": "affected",
"version": "1.0.75"
},
{
"status": "affected",
"version": "1.0.76"
},
{
"status": "affected",
"version": "1.0.77"
},
{
"status": "affected",
"version": "1.0.78"
},
{
"status": "affected",
"version": "1.0.79"
},
{
"status": "affected",
"version": "1.0.80"
},
{
"status": "affected",
"version": "1.0.81"
},
{
"status": "affected",
"version": "1.0.82"
},
{
"status": "affected",
"version": "1.0.83"
},
{
"status": "affected",
"version": "1.0.84"
}
]
}
],
"source": "cna@vuldb.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:happyfish100:libfastcommon:*:*:*:*:*:*:*:*",
"matchCriteriaId": "C75F73CF-18BB-4FE5-9440-693DD0E92FFF",
"versionEndIncluding": "1.0.84",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Se ha detectado una vulnerabilidad de seguridad en happyfish100 libfastcommon hasta la versi\u00f3n 1.0.84. Afectada por esta vulnerabilidad es la funci\u00f3n base64_decode del archivo src/base64.c. La manipulaci\u00f3n conduce a un desbordamiento de b\u00fafer basado en pila. Se requiere acceso local para abordar este ataque. El exploit ha sido divulgado p\u00fablicamente y puede ser utilizado. El identificador del parche es 82f66af3e252e3e137dba0c3891570f085e79adf. Aplicar un parche es la acci\u00f3n recomendada para solucionar este problema."
}
],
"id": "CVE-2026-2016",
"lastModified": "2026-06-17T10:30:00.997",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "LOCAL",
"authentication": "SINGLE",
"availabilityImpact": "PARTIAL",
"baseScore": 4.3,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 3.1,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "cna@vuldb.com",
"type": "Secondary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 3.4,
"source": "cna@vuldb.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"cvssMetricV40": [
{
"cvssData": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"availabilityRequirement": "NOT_DEFINED",
"baseScore": 1.9,
"baseSeverity": "LOW",
"confidentialityRequirement": "NOT_DEFINED",
"exploitMaturity": "PROOF_OF_CONCEPT",
"integrityRequirement": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "LOW",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "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",
"version": "4.0",
"vulnAvailabilityImpact": "LOW",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"source": "cna@vuldb.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-2016",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-06T13:08:24.871953Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-02-06T12:16:26.073",
"references": [
{
"source": "cna@vuldb.com",
"tags": [
"Product"
],
"url": "https://github.com/happyfish100/libfastcommon/"
},
{
"source": "cna@vuldb.com",
"tags": [
"Patch"
],
"url": "https://github.com/happyfish100/libfastcommon/commit/82f66af3e252e3e137dba0c3891570f085e79adf"
},
{
"source": "cna@vuldb.com",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://github.com/happyfish100/libfastcommon/issues/55"
},
{
"source": "cna@vuldb.com",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://github.com/happyfish100/libfastcommon/issues/55#issue-3836362577"
},
{
"source": "cna@vuldb.com",
"tags": [
"Exploit",
"Vendor Advisory"
],
"url": "https://github.com/happyfish100/libfastcommon/issues/55#issuecomment-3776757848"
},
{
"source": "cna@vuldb.com",
"tags": [
"Permissions Required",
"VDB Entry"
],
"url": "https://vuldb.com/?ctiid.344598"
},
{
"source": "cna@vuldb.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://vuldb.com/?id.344598"
},
{
"source": "cna@vuldb.com",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://vuldb.com/?submit.743873"
}
],
"sourceIdentifier": "cna@vuldb.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-119"
},
{
"lang": "en",
"value": "CWE-121"
}
],
"source": "cna@vuldb.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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