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TI-2011-04166 Aliases CVE-2011-4838GHSA-cgqc-fqxr-q6r6

JRuby before 1.6.5.1 computes hash values without restricting the ability to trigger hash…

Priority LOW 30CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Partial
Fix status
Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-400.

Summary

JRuby before 1.6.5.1 computes hash values without restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table.

Why it matters now

EPSS 0.04203 91st percentileScored 2026-11-07
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:jruby:jruby:*:*:*:*:*:*:*:*before 1.6.5.1Vulnerablejruby
  • cpe:2.3:a:jruby:jruby:*:*:*:*:*:*:*:* Versions before 1.6.5.1 Vulnerable ·jruby

Remediation

Red Hat 1 advisory

  • RHSA-2012:1125 Released 2012-07-31 · Red Hat rating Important
    JBoss Enterprise SOA Platform 5.3.0 update
    • Red Hat JBoss SOA Platform 5.3

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat JBoss SOA Platform 5AffectedNo fix yet
Red Hat JBoss SOA Platform 5.3Fixed RHSA-2012:1125

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-4838
  2. 2026-10-03 Alias added: GHSA-cgqc-fqxr-q6r6

References

Advisory 6

Other 1

  • TI-2025-29269 JRuby-OpenSSL has hostname verification disabled by default CVSS 4.0MEDIUM 5.7
  • TI-2012-04543 JRuby computes hash values without properly restricting the ability to trigger hash… CVSS 2.0MEDIUM 5.0
  • TI-2010-01285 The regular expression engine in JRuby before 1.4.1, when $KCODE is set to 'u', does not… CVSS 2.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences