Moderate severityNVD Advisory· Published Aug 29, 2011· Updated Jun 16, 2026
CVE-2011-3186
CVE-2011-3186
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
actionpackRubyGems | >= 2.3.0, < 2.3.13 | 2.3.13 |
Affected products
8cpe:2.3:a:rubyonrails:rails:2.3.10:*:*:*:*:*:*:*+ 6 more
- cpe:2.3:a:rubyonrails:rails:2.3.10:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.11:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.12:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.2:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.3:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.4:*:*:*:*:*:*:*
- cpe:2.3:a:rubyonrails:rails:2.3.9:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
17- groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78cnvdPatchWEB
- www.openwall.com/lists/oss-security/2011/08/17/1nvdPatchWEB
- www.openwall.com/lists/oss-security/2011/08/19/11nvdPatchWEB
- www.openwall.com/lists/oss-security/2011/08/20/1nvdPatchWEB
- www.openwall.com/lists/oss-security/2011/08/22/13nvdPatchWEB
- www.openwall.com/lists/oss-security/2011/08/22/5nvdPatchWEB
- bugzilla.redhat.com/show_bug.cginvdPatchWEB
- github.com/rails/rails/commit/11dafeaa7533be26441a63618be93a03869c83a9nvdPatchWEB
- github.com/advisories/GHSA-fcqf-h4h4-695mghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2011-3186ghsaADVISORY
- lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.htmlnvdWEB
- www.debian.org/security/2011/dsa-2301nvdWEB
- www.openwall.com/lists/oss-security/2011/08/22/14nvdWEB
- github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2011-3186.ymlghsaWEB
- groups.google.com/forum/ghsaWEB
- web.archive.org/web/20150201000000*/http://secunia.com/advisories/45921ghsaWEB
- secunia.com/advisories/45921nvd
News mentions
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