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Vulnerability details: VCID-4tzv-1t1b-t3g3
Vulnerability ID VCID-4tzv-1t1b-t3g3
Aliases CVE-2026-33169
GHSA-cg4j-q9v8-6v38
Summary Rails Active Support has a possible ReDoS vulnerability in number_to_delimited ### Impact `NumberToDelimitedConverter` used a regular expression with `gsub!` to insert thousands delimiters. This could produce quadratic time complexity on long digit strings. ### Releases The fixed releases are available at the normal locations.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-1333 Inefficient Regular Expression Complexity
CWE-400 Uncontrolled Resource Consumption
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33169.json
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-33169
cvssv3.1 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-cg4j-q9v8-6v38
cvssv4 6.9 https://github.com/rails/rails
generic_textual MODERATE https://github.com/rails/rails
cvssv4 6.9 https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
generic_textual MODERATE https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
ssvc Track https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
cvssv4 6.9 https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
generic_textual MODERATE https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
ssvc Track https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
cvssv4 6.9 https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
generic_textual MODERATE https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
ssvc Track https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
cvssv4 6.9 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 6.9 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 6.9 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
cvssv3.1_qr MODERATE https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
cvssv4 6.9 https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
generic_textual MODERATE https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
ssvc Track https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2026-33169
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-33169
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33169.json
https://api.first.org/data/v1/epss?cve=CVE-2026-33169
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33169
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/rails/rails
https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
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-cg4j-q9v8-6v38
https://nvd.nist.gov/vuln/detail/CVE-2026-33169
1132035 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132035
2450556 https://bugzilla.redhat.com/show_bug.cgi?id=2450556
GHSA-cg4j-q9v8-6v38 https://github.com/advisories/GHSA-cg4j-q9v8-6v38
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-2026-33169.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

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required

unchanged

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

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low

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
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:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ Found at https://github.com/rails/rails/commit/29154f1097da13d48fdb3200760b3e3da66dcb11
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
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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present

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ Found at https://github.com/rails/rails/commit/b54a4b373c6f042cab6ee2033246b1c9ecc38974
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
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:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ Found at https://github.com/rails/rails/commit/ec1a0e215efd27a3b3911aae6df978a80f456a49
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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

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present

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passive

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ 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:N/VC:N/VI:N/VA:L/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:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ 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:N/VC:N/VI:N/VA:L/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

high

none

present

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passive

active

high

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none

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ 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:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
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

high

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passive

active

high

low

none

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-24T15:45:49Z/ Found at https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-33169
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

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Exploit Prediction Scoring System (EPSS)
Percentile 0.04814
EPSS Score 0.00019
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:54:09.098764+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-cg4j-q9v8-6v38/GHSA-cg4j-q9v8-6v38.json 38.0.0