CVE-2026-33169
MEDIUM
2026-03-23
https://github.com/rails/rails
5.3
CVSS 3.1
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CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Lifecycle Timeline
3
Analysis Generated
Mar 23, 2026 - 21:00 vuln.today
Patch Released
Mar 23, 2026 - 21:00 nvd
Patch available
CVE Published
Mar 23, 2026 - 20:52 nvd
MEDIUM 5.3
Tags
Description
### 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.
Analysis
A regular expression denial of service (ReDoS) vulnerability exists in Rails ActiveSupport's NumberToDelimitedConverter, which uses gsub! with an inefficient regex pattern to insert thousands delimiters into numeric strings. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.
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Priority Score
27
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +26
POC: 0
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External POC / Exploit Code
Leaving vuln.today
Destination URL
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