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Vulnerability details: VCID-vkat-4jbr-1ubk
Vulnerability ID VCID-vkat-4jbr-1ubk
Aliases CVE-2021-29509
GHSA-q28m-8xjw-8vr5
Summary
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.01358 https://api.first.org/data/v1/epss?cve=CVE-2021-29509
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837
generic_textual HIGH https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-q28m-8xjw-8vr5
cvssv3.1 7.5 https://github.com/puma/puma
generic_textual HIGH https://github.com/puma/puma
cvssv3 7.5 https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
cvssv3.1 7.5 https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
cvssv3.1_qr HIGH https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
generic_textual HIGH https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
cvssv3.1 7.5 https://github.com/puma/puma/security/policy
generic_textual HIGH https://github.com/puma/puma/security/policy
cvssv3.1 7.5 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.yml
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
generic_textual HIGH https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29509
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2021-29509
cvssv3.1 7.5 https://rubygems.org/gems/puma
generic_textual HIGH https://rubygems.org/gems/puma
cvssv3.1 7.5 https://security.gentoo.org/glsa/202208-28
generic_textual HIGH https://security.gentoo.org/glsa/202208-28
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2021-29509
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837
https://github.com/puma/puma
https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
https://github.com/puma/puma/security/policy
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.yml
https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
https://nvd.nist.gov/vuln/detail/CVE-2021-29509
https://rubygems.org/gems/puma
https://security.gentoo.org/glsa/202208-28
989054 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989054
GHSA-q28m-8xjw-8vr5 https://github.com/advisories/GHSA-q28m-8xjw-8vr5
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://gist.github.com/nateberkopec/4b3ea5676c0d70cbb37c82d54be25837
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:N/S:U/C:N/I:N/A:H 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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/puma/puma/security/advisories/GHSA-q28m-8xjw-8vr5
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:N/S:U/C:N/I:N/A:H Found at https://github.com/puma/puma/security/policy
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:N/S:U/C:N/I:N/A:H Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2021-29509.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:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29509
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:N/S:U/C:N/I:N/A:H Found at https://rubygems.org/gems/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:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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
Exploit Prediction Scoring System (EPSS)
Percentile 0.80455
EPSS Score 0.01358
Published At May 30, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-30T22:09:35.368715+00:00 EPSS Importer Import https://epss.cyentia.com/epss_scores-current.csv.gz 38.6.0