FKIE_CVE-2021-22959
Vulnerability from fkie_nvd - Published: 2021-11-15 15:15 - Updated: 2026-06-17 03:38
Severity
Summary
The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp < v2.1.4 and < v6.0.6.
References
| URL | Tags | ||
|---|---|---|---|
| support@hackerone.com | https://hackerone.com/reports/1238709 | Exploit, Issue Tracking, Third Party Advisory | |
| support@hackerone.com | https://www.debian.org/security/2022/dsa-5170 | Mailing List, Third Party Advisory | |
| support@hackerone.com | https://www.oracle.com/security-alerts/cpujan2022.html | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://hackerone.com/reports/1238709 | Exploit, Issue Tracking, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.debian.org/security/2022/dsa-5170 | Mailing List, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://www.oracle.com/security-alerts/cpujan2022.html | Patch, Third Party Advisory |
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Node",
"vendor": "NodeJS",
"versions": [
{
"lessThan": "4.*",
"status": "affected",
"version": "4.0",
"versionType": "semver"
},
{
"lessThan": "5.*",
"status": "affected",
"version": "5.0",
"versionType": "semver"
},
{
"lessThan": "6.*",
"status": "affected",
"version": "6.0",
"versionType": "semver"
},
{
"lessThan": "7.*",
"status": "affected",
"version": "7.0",
"versionType": "semver"
},
{
"lessThan": "8.*",
"status": "affected",
"version": "8.0",
"versionType": "semver"
},
{
"lessThan": "9.*",
"status": "affected",
"version": "9.0",
"versionType": "semver"
},
{
"lessThan": "10.*",
"status": "affected",
"version": "10.0",
"versionType": "semver"
},
{
"lessThan": "11.*",
"status": "affected",
"version": "11.0",
"versionType": "semver"
},
{
"lessThan": "12.22.7",
"status": "affected",
"version": "12.0",
"versionType": "semver"
},
{
"lessThan": "13.*",
"status": "affected",
"version": "13.0",
"versionType": "semver"
},
{
"lessThan": "14.18.1",
"status": "affected",
"version": "14.0",
"versionType": "semver"
},
{
"lessThan": "15.*",
"status": "affected",
"version": "15.0",
"versionType": "semver"
},
{
"lessThan": "16.11.1",
"status": "affected",
"version": "16.0",
"versionType": "semver"
}
]
}
],
"source": "support@hackerone.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*",
"matchCriteriaId": "6B7CB576-CA48-462E-A360-6CE14FADCC6A",
"versionEndExcluding": "2.1.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*",
"matchCriteriaId": "AF1511BB-A1F0-4AF9-80C3-5EB6317F8525",
"versionEndExcluding": "6.0.6",
"versionStartIncluding": "3.0.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:*",
"matchCriteriaId": "9F300E13-1B40-4B35-ACA5-4D402CD41055",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:*",
"matchCriteriaId": "B10E38A6-783C-45A2-98A1-12FA1EB3D3AA",
"vulnerable": true
}
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"operator": "OR"
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},
{
"nodes": [
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The parser in accepts requests with a space (SP) right after the header name before the colon. This can lead to HTTP Request Smuggling (HRS) in llhttp \u003c v2.1.4 and \u003c v6.0.6."
},
{
"lang": "es",
"value": "El parser en acepta peticiones con un espacio (SP) justo despu\u00e9s del nombre del encabezado antes de los dos puntos. Esto puede conllevar a un contrabando de peticiones HTTP (HRS) en llhttp versiones anteriores a v2.1.4 y versiones anteriores a v6.0.6"
}
],
"id": "CVE-2021-22959",
"lastModified": "2026-06-17T03:38:06.607",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 6.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 2.5,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2021-11-15T15:15:06.747",
"references": [
{
"source": "support@hackerone.com",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/1238709"
},
{
"source": "support@hackerone.com",
"tags": [
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"Third Party Advisory"
],
"url": "https://www.debian.org/security/2022/dsa-5170"
},
{
"source": "support@hackerone.com",
"tags": [
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"Third Party Advisory"
],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://hackerone.com/reports/1238709"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://www.debian.org/security/2022/dsa-5170"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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],
"url": "https://www.oracle.com/security-alerts/cpujan2022.html"
}
],
"sourceIdentifier": "support@hackerone.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-444"
}
],
"source": "support@hackerone.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-444"
}
],
"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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