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Vulnerability details: VCID-uypg-fgmq-37cu
Vulnerability ID VCID-uypg-fgmq-37cu
Aliases CVE-2021-22960
Summary The parse function in llhttp < 2.1.4 and < 6.0.6. ignores chunk extensions when parsing the body of chunked requests. This leads to HTTP Request Smuggling (HRS) under certain conditions.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 6.1 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22960.json
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00132 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-22960
cvssv3.1 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.8 https://nvd.nist.gov/vuln/detail/CVE-2021-22960
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-22960
archlinux Medium https://security.archlinux.org/AVG-2460
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22960.json
https://api.first.org/data/v1/epss?cve=CVE-2021-22960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22959
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22960
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44531
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44532
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44533
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21824
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://hackerone.com/reports/1238099
https://www.debian.org/security/2022/dsa-5170
https://www.oracle.com/security-alerts/cpujan2022.html
2014059 https://bugzilla.redhat.com/show_bug.cgi?id=2014059
ASA-202110-4 https://security.archlinux.org/ASA-202110-4
AVG-2460 https://security.archlinux.org/AVG-2460
cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:llhttp:llhttp:*:*:*:*:*:node.js:*:*
cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:graalvm:20.3.4:*:*:*:enterprise:*:*:*
cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:graalvm:21.3.0:*:*:*:enterprise:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2021-22960 https://nvd.nist.gov/vuln/detail/CVE-2021-22960
RHSA-2021:5171 https://access.redhat.com/errata/RHSA-2021:5171
RHSA-2022:0041 https://access.redhat.com/errata/RHSA-2022:0041
RHSA-2022:0246 https://access.redhat.com/errata/RHSA-2022:0246
RHSA-2022:0350 https://access.redhat.com/errata/RHSA-2022:0350
RHSA-2022:4914 https://access.redhat.com/errata/RHSA-2022:4914
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-22960.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22960
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-22960
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.33777
EPSS Score 0.00132
Published At Aug. 1, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:28:18.669285+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.17/main.json 37.0.0