Description
Rack is a modular Ruby web server interface. Carefully crafted headers can cause header parsing in Rack to take longer than expected resulting in a possible denial of service issue. Accept and Forwarded headers are impacted. Ruby 3.2 has mitigations for this problem, so Rack applications using Ruby 3.2 or newer are unaffected. This vulnerability is fixed in 2.0.9.4, 2.1.4.4, 2.2.8.1, and 3.0.9.1.
Scores
CVSS v3
5.3
EPSS
0.0077
EPSS Percentile
73.7%
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
Status
published
Products (3)
debian/debian_linux
10.0
rack/rack
0.4 - 2.0.9.4
rubygems/rack
3.0.0 - 3.0.9.1RubyGems
Published
Feb 29, 2024
Tracked Since
Feb 18, 2026