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Vulnerability details: VCID-s5az-svpe-puhc
Vulnerability ID VCID-s5az-svpe-puhc
Aliases CVE-2021-41945
GHSA-h8pj-cxx2-jfg2
PYSEC-2022-183
Summary access restriction bypass
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-20 Improper Input Validation
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 9.1 http://encode.com
cvssv4 9.3 http://encode.com
generic_textual CRITICAL http://encode.com
epss 0.00691 https://api.first.org/data/v1/epss?cve=CVE-2021-41945
epss 0.00691 https://api.first.org/data/v1/epss?cve=CVE-2021-41945
epss 0.00691 https://api.first.org/data/v1/epss?cve=CVE-2021-41945
cvssv3.1 9.1 https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
cvssv4 9.3 https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
generic_textual CRITICAL https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
cvssv3.1 9.1 https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
cvssv4 9.3 https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
generic_textual CRITICAL https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
cvssv3.1 9.1 https://github.com/encode/httpx
cvssv4 9.3 https://github.com/encode/httpx
generic_textual CRITICAL https://github.com/encode/httpx
cvssv3.1 9.1 https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
cvssv4 9.3 https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
generic_textual CRITICAL https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
cvssv3.1 9.1 https://github.com/encode/httpx/discussions/1831
cvssv4 9.3 https://github.com/encode/httpx/discussions/1831
generic_textual CRITICAL https://github.com/encode/httpx/discussions/1831
cvssv3.1 9.1 https://github.com/encode/httpx/issues/2184
cvssv4 9.3 https://github.com/encode/httpx/issues/2184
generic_textual CRITICAL https://github.com/encode/httpx/issues/2184
cvssv3.1 9.1 https://github.com/encode/httpx/pull/2185
cvssv4 9.3 https://github.com/encode/httpx/pull/2185
generic_textual CRITICAL https://github.com/encode/httpx/pull/2185
cvssv3.1 9.1 https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
cvssv4 9.3 https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
generic_textual CRITICAL https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
cvssv3.1 9.1 https://github.com/encode/httpx/releases/tag/0.23.0
cvssv4 9.3 https://github.com/encode/httpx/releases/tag/0.23.0
generic_textual CRITICAL https://github.com/encode/httpx/releases/tag/0.23.0
cvssv3.1 9.1 https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml
cvssv4 9.3 https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml
generic_textual CRITICAL https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml
cvssv3.1 9.1 https://nvd.nist.gov/vuln/detail/CVE-2021-41945
cvssv4 9.3 https://nvd.nist.gov/vuln/detail/CVE-2021-41945
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2021-41945
archlinux Critical https://security.archlinux.org/AVG-2718
Reference id Reference type URL
http://encode.com
https://api.first.org/data/v1/epss?cve=CVE-2021-41945
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-41945
https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
https://github.com/encode/httpx
https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
https://github.com/encode/httpx/discussions/1831
https://github.com/encode/httpx/issues/2184
https://github.com/encode/httpx/pull/2185
https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
https://github.com/encode/httpx/releases/tag/0.23.0
https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml
1010336 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1010336
AVG-2718 https://security.archlinux.org/AVG-2718
CVE-2021-41945 https://nvd.nist.gov/vuln/detail/CVE-2021-41945
GHSA-h8pj-cxx2-jfg2 https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at http://encode.com
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at http://encode.com
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://gist.github.com/lebr0nli/4edb76bbd3b5ff993cf44f2fbce5e571
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/advisories/GHSA-h8pj-cxx2-jfg2
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/commit/e9b0c85dd4f4e4469c57c4b38e5101fd12081b5c
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/discussions/1831
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/discussions/1831
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/issues/2184
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/issues/2184
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/pull/2185
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

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/pull/2185
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
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

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/pull/2185/commits/e3c495a32c63d8aa7f1bcf3b7b27ee1a0ff428e1
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/encode/httpx/releases/tag/0.23.0
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

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/encode/httpx/releases/tag/0.23.0
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.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

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/pypa/advisory-database/tree/main/vulns/httpx/PYSEC-2022-183.yaml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41945
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

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unchanged

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41945
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Exploit Prediction Scoring System (EPSS)
Percentile 0.72286
EPSS Score 0.00691
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T19:56:03.990510+00:00 Arch Linux Importer Import https://security.archlinux.org/AVG-2718 38.6.0