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Vulnerability details: VCID-99ek-f3bn-jke8
Vulnerability ID VCID-99ek-f3bn-jke8
Aliases CVE-2021-41136
GHSA-48w2-rm65-62xx
Summary
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
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
epss 0.00288 https://api.first.org/data/v1/epss?cve=CVE-2021-41136
cvssv3.1 3.7 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 3.7 https://github.com/puma/puma
generic_textual LOW https://github.com/puma/puma
cvssv3.1 3.7 https://github.com/puma/puma/commit/436c71807f00e07070902a03f79fd3e130eb6b18
generic_textual LOW https://github.com/puma/puma/commit/436c71807f00e07070902a03f79fd3e130eb6b18
cvssv3.1 3.7 https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f
generic_textual LOW https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f
cvssv3.1 3.7 https://github.com/puma/puma/commit/fb6ad8f8013ab5cdbb2f444cbfabd0b4fde71139
generic_textual LOW https://github.com/puma/puma/commit/fb6ad8f8013ab5cdbb2f444cbfabd0b4fde71139
cvssv3.1 3.7 https://github.com/puma/puma/releases/tag/v4.3.9
generic_textual LOW https://github.com/puma/puma/releases/tag/v4.3.9
cvssv3.1 3.7 https://github.com/puma/puma/releases/tag/v5.5.1
generic_textual LOW https://github.com/puma/puma/releases/tag/v5.5.1
cvssv3 3.7 https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
cvssv3.1 3.7 https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
generic_textual LOW https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
cvssv3.1 3.7 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-41136.yml
generic_textual LOW https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-41136.yml
cvssv3.1 3.7 https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
generic_textual LOW https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
cvssv3.1 3.7 https://nvd.nist.gov/vuln/detail/CVE-2021-41136
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2021-41136
archlinux High https://security.archlinux.org/AVG-2764
cvssv3.1 3.7 https://security.gentoo.org/glsa/202208-28
generic_textual LOW https://security.gentoo.org/glsa/202208-28
cvssv3.1 3.7 https://www.debian.org/security/2022/dsa-5146
generic_textual LOW https://www.debian.org/security/2022/dsa-5146
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-41136
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/puma/puma
https://github.com/puma/puma/commit/436c71807f00e07070902a03f79fd3e130eb6b18
https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f
https://github.com/puma/puma/commit/fb6ad8f8013ab5cdbb2f444cbfabd0b4fde71139
https://github.com/puma/puma/releases/tag/v4.3.9
https://github.com/puma/puma/releases/tag/v5.5.1
https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
https://security.gentoo.org/glsa/202208-28
https://www.debian.org/security/2022/dsa-5146
AVG-2764 https://security.archlinux.org/AVG-2764
CVE-2021-41136 https://nvd.nist.gov/vuln/detail/CVE-2021-41136
CVE-2021-41136.YML https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-41136.yml
GHSA-48w2-rm65-62xx https://github.com/advisories/GHSA-48w2-rm65-62xx
GHSA-48w2-rm65-62xx https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/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: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/commit/436c71807f00e07070902a03f79fd3e130eb6b18
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/commit/acdc3ae571dfae0e045cf09a295280127db65c7f
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/commit/fb6ad8f8013ab5cdbb2f444cbfabd0b4fde71139
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/releases/tag/v4.3.9
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/releases/tag/v5.5.1
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/puma/puma/security/advisories/GHSA-48w2-rm65-62xx
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-41136.yml
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41136
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://security.gentoo.org/glsa/202208-28
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:H/PR:L/UI:R/S:U/C:L/I:L/A:N Found at https://www.debian.org/security/2022/dsa-5146
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 0.52437
EPSS Score 0.00288
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T19:35:43.892654+00:00 Arch Linux Importer Import https://security.archlinux.org/AVG-2764 38.6.0