Staging Environment: Content and features may be unstable or change without notice.
Advisory details: ruby_advisory_db / gems/activesupport/CVE-2026-33169
Advisory ID ruby_advisory_db/gems/activesupport/CVE-2026-33169
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 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (0)
There are no known CWE.
System Score Found at
cvssv4 6.9
Reference id Reference type URL
GHSA-cg4j-q9v8-6v38 https://github.com/rails/rails/security/advisories/GHSA-cg4j-q9v8-6v38
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
There are no known vectors.

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

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/33xxx/CVE-2026-33169.json

Source Advisory: vulnrichment/CVE-2026-33169

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]