Vulnerability Details CVE-2021-22959
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 43.3%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 6.4
Products affected by CVE-2021-22959
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cpe:2.3:a:llhttp:llhttp:-
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cpe:2.3:a:llhttp:llhttp:1.0.1
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cpe:2.3:a:llhttp:llhttp:1.1.0
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cpe:2.3:a:llhttp:llhttp:1.1.1
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cpe:2.3:a:llhttp:llhttp:1.1.2
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cpe:2.3:a:llhttp:llhttp:1.1.3
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cpe:2.3:a:llhttp:llhttp:1.1.4
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cpe:2.3:a:llhttp:llhttp:2.0.0
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cpe:2.3:a:llhttp:llhttp:2.0.1
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cpe:2.3:a:llhttp:llhttp:2.0.2
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cpe:2.3:a:llhttp:llhttp:2.0.3
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cpe:2.3:a:llhttp:llhttp:2.0.4
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cpe:2.3:a:llhttp:llhttp:2.0.5
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cpe:2.3:a:llhttp:llhttp:2.1.0
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cpe:2.3:a:llhttp:llhttp:2.1.1
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cpe:2.3:a:llhttp:llhttp:2.1.3
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cpe:2.3:a:llhttp:llhttp:3.0.0
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cpe:2.3:a:llhttp:llhttp:3.0.1
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cpe:2.3:a:llhttp:llhttp:4.0.0
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cpe:2.3:a:llhttp:llhttp:4.1.0
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cpe:2.3:a:llhttp:llhttp:4.1.1
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cpe:2.3:a:llhttp:llhttp:5.0.0
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cpe:2.3:a:llhttp:llhttp:5.1.0
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cpe:2.3:a:llhttp:llhttp:6.0.0
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cpe:2.3:a:llhttp:llhttp:6.0.1
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cpe:2.3:a:llhttp:llhttp:6.0.2
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cpe:2.3:a:llhttp:llhttp:6.0.3
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cpe:2.3:a:llhttp:llhttp:6.0.4
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cpe:2.3:a:llhttp:llhttp:6.0.5
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cpe:2.3:a:oracle:graalvm:20.3.4
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cpe:2.3:a:oracle:graalvm:21.3.0
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cpe:2.3:o:debian:debian_linux:11.0