CVE-2011-5036

mediumpriority · track · 21EPSS 0.039 · 90 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

3.87% (90th) EPSS

CVSS 5 · medium

Is it mine?

17 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

cvss

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

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-310USprimaryCWE-328USCWE-400US

affected products (17)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
rack project rack≤ 1.1.0nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.2.0nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.2.1nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.2.2nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.2.3nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.2.4nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.0nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.1nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.2nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.3nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.4nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
rack project rack= 1.3.5nvdUScpe:2.3:a:rack_project:rack:*:*:*:*:*:*:*:*
Maven org.jruby:jruby-parent< 1.6.5.1osvUSpkg:maven/org.jruby/jruby-parent
RubyGems rack< 1.1.3osvUSpkg:gem/rack
RubyGems rack1.2.0 → 1.2.5osvUSpkg:gem/rack
RubyGems rack1.3.0 → 1.3.6osvUSpkg:gem/rack

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-v6j3-7jrw-hq2pRack Gem Subject to Denial of Service via Hash Collisions2022-05-17ghsa · osvUS
Rack before 1.1.3, 1.2.x before 1.2.5, and 1.3.x before 1.3.6 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

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 2011-12-30modified 2026-06-16

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+2915 more

references (16)

External citations — patches, advisories, analysis.

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