Description
Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. `NumberToDelimitedConverter` uses a lookahead-based regular expression with `gsub!` to insert thousands delimiters. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, the interaction between the repeated lookahead group and `gsub!` can produce quadratic time complexity on long digit strings. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Scores
CVSS v3
5.3
EPSS
0.0002
EPSS Percentile
5.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-1333
CWE-400
Status
published
Products (5)
rails/activesupport
< 7.2.3.1
rails/activesupport
>= 8.0.0.beta1, < 8.0.4.1
rails/activesupport
>= 8.1.0.beta1, < 8.1.2.1
rubygems/activesupport
8.1.0.beta1 - 8.1.2.1RubyGems
rubyonrails/rails
< 7.2.3.1
Published
Mar 24, 2026
Tracked Since
Mar 24, 2026