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Vulnerability details: VCID-bfja-3d1f-nyef
Vulnerability ID VCID-bfja-3d1f-nyef
Aliases CVE-2021-41186
GHSA-hwhf-64mh-r662
Summary
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
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
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41186.json
epss 0.00486 https://api.first.org/data/v1/epss?cve=CVE-2021-41186
epss 0.00486 https://api.first.org/data/v1/epss?cve=CVE-2021-41186
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-hwhf-64mh-r662
cvssv3.1 5.9 https://github.com/fluent/fluentd
generic_textual MODERATE https://github.com/fluent/fluentd
cvssv3.1 5.9 https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
generic_textual MODERATE https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
cvssv3.1 5.9 https://github.com/fluent/fluentd/commit/5482a3d049dab351de0be68f4b4bc562319d8511
generic_textual MODERATE https://github.com/fluent/fluentd/commit/5482a3d049dab351de0be68f4b4bc562319d8511
cvssv3 5.9 https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
cvssv3.1 5.9 https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
cvssv3.1_qr MODERATE https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
generic_textual MODERATE https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
cvssv3.1 5.9 https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
generic_textual MODERATE https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
cvssv3.1 5.9 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2021-41186.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2021-41186.yml
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-41186
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-41186
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41186.json
https://api.first.org/data/v1/epss?cve=CVE-2021-41186
https://github.com/fluent/fluentd
https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
https://github.com/fluent/fluentd/commit/5482a3d049dab351de0be68f4b4bc562319d8511
https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2021-41186.yml
https://nvd.nist.gov/vuln/detail/CVE-2021-41186
2019184 https://bugzilla.redhat.com/show_bug.cgi?id=2019184
GHSA-hwhf-64mh-r662 https://github.com/advisories/GHSA-hwhf-64mh-r662
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-41186.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:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fluent/fluentd
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fluent/fluentd/blob/master/CHANGELOG.md#v1142
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fluent/fluentd/commit/5482a3d049dab351de0be68f4b4bc562319d8511
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fluent/fluentd/security/advisories/GHSA-hwhf-64mh-r662
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/github/securitylab-vulnerabilities/blob/52dc4a2a828c6dc24231967c2937ad92038184a9/vendor_reports/GHSL-2021-102-fluent-fluentd.md
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:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/fluentd/CVE-2021-41186.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:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-41186
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 0.65818
EPSS Score 0.00486
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-12T02:02:59.767345+00:00 EPSS Importer Import https://epss.cyentia.com/epss_scores-current.csv.gz 38.6.0