CVE-2011-3186

mediumpriority · track · 18EPSS 0.017 · 78 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.75% (78th) EPSS

CVSS 4.3 · medium

Is it mine?

9 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-28

CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:P/A:Nprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.7lowAV:N/AC:M/Au:N/C:N/I:P/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USprimaryCWE-94US

affected products (9)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
rubyonrails rails= 2.3.10nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.11nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.12nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.2nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.3nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.4nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails= 2.3.9nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
RubyGems actionpack2.3.0 → 2.3.13osvUSpkg:gem/actionpack

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-fcqf-h4h4-695mactionpack CRLF injection vulnerability2017-10-24ghsa · osvUS
CRLF injection vulnerability in `actionpack/lib/action_controller/response.rb` in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2011-08-29modified 2026-06-16

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+10449 more

references (36)

External citations — patches, advisories, analysis.

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