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Vulnerability details: VCID-hdsb-jx4g-fqf6
Vulnerability ID VCID-hdsb-jx4g-fqf6
Aliases CVE-2026-33170
GHSA-89vf-4333-qx8v
Summary Rails: Active Support: Active Support: Cross-Site Scripting (XSS) due to improper HTML safety flag propagation in SafeBuffer#%
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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 5.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33170.json
epss 0.0001 https://api.first.org/data/v1/epss?cve=CVE-2026-33170
cvssv3.1 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv4 5.3 https://github.com/rails/rails
generic_textual MODERATE https://github.com/rails/rails
cvssv4 5.3 https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
generic_textual MODERATE https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
ssvc Track https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
cvssv4 5.3 https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
generic_textual MODERATE https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
ssvc Track https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
cvssv4 5.3 https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
generic_textual MODERATE https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
ssvc Track https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
cvssv4 5.3 https://github.com/rails/rails/releases/tag/v7.2.3.1
generic_textual MODERATE https://github.com/rails/rails/releases/tag/v7.2.3.1
ssvc Track https://github.com/rails/rails/releases/tag/v7.2.3.1
cvssv4 5.3 https://github.com/rails/rails/releases/tag/v8.0.4.1
generic_textual MODERATE https://github.com/rails/rails/releases/tag/v8.0.4.1
ssvc Track https://github.com/rails/rails/releases/tag/v8.0.4.1
cvssv4 5.3 https://github.com/rails/rails/releases/tag/v8.1.2.1
generic_textual MODERATE https://github.com/rails/rails/releases/tag/v8.1.2.1
ssvc Track https://github.com/rails/rails/releases/tag/v8.1.2.1
cvssv4 5.3 https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
generic_textual MODERATE https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
ssvc Track https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
cvssv4 5.3 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33170.yml
generic_textual MODERATE https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33170.yml
cvssv4 5.3 https://nvd.nist.gov/vuln/detail/CVE-2026-33170
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-33170
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33170.json
https://api.first.org/data/v1/epss?cve=CVE-2026-33170
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33170
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/rails/rails
https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
https://github.com/rails/rails/releases/tag/v7.2.3.1
https://github.com/rails/rails/releases/tag/v8.0.4.1
https://github.com/rails/rails/releases/tag/v8.1.2.1
https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33170.yml
https://nvd.nist.gov/vuln/detail/CVE-2026-33170
1132035 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132035
2450543 https://bugzilla.redhat.com/show_bug.cgi?id=2450543
GHSA-89vf-4333-qx8v https://github.com/advisories/GHSA-89vf-4333-qx8v
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33170.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

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none

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required

unchanged

changed

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/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

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required

unchanged

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails
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

adjacent

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
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

adjacent

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present

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
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

adjacent

local

physical

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present

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passive

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
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

adjacent

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physical

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/releases/tag/v7.2.3.1
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

adjacent

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physical

low

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present

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passive

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/releases/tag/v7.2.3.1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/releases/tag/v8.0.4.1
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

adjacent

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/releases/tag/v8.0.4.1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/releases/tag/v8.1.2.1
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

adjacent

local

physical

low

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present

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passive

active

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/releases/tag/v8.1.2.1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
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

adjacent

local

physical

low

high

none

present

none

low

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passive

active

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none

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-25T19:20:16Z/ Found at https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activesupport/CVE-2026-33170.yml
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

adjacent

local

physical

low

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present

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passive

active

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-33170
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

adjacent

local

physical

low

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none

present

none

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passive

active

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Exploit Prediction Scoring System (EPSS)
Percentile 0.01144
EPSS Score 0.0001
Published At May 29, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-29T08:42:37.962404+00:00 RedHat Importer Import https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33170.json 38.6.0