Read the docs
TI-2021-05765 Aliases CVE-2021-22904GHSA-7wjx-3g7j-8584

Uncontrolled resource consumption in https://github.com/rails/rails

Priority MEDIUM 41CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 1 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-400.

Summary

The actionpack ruby gem before 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 suffers from a possible denial of service vulnerability in the Token Authentication logic in Action Controller due to a too permissive regular expression. Impacted code uses `authenticate_or_request_with_http_token` or `authenticate_with_http_token` for request authentication.

Why it matters now

EPSS 0.04868 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial actionpack (RubyGems): 6.0.3.7, 6.1.3.2, 5.2.6 +1Red Hat: 1 advisoryRed Hat: 1 fixed, 3 without a fix

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
—https://github.com/rails/railsFixed in 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6—No fix listedCNA
—actionpack (RubyGems)6.0.0 to before 6.0.3.76.0.3.7Patch availableGHSA-7wjx-3g7j-8584
—actionpack (RubyGems)6.1.0 to before 6.1.3.26.1.3.2Patch availableGHSA-7wjx-3g7j-8584
—actionpack (RubyGems)5.2.5 to before 5.2.65.2.6Patch availableGHSA-7wjx-3g7j-8584
—actionpack (RubyGems)4.0.0 to before 5.2.4.65.2.4.6Patch availableGHSA-7wjx-3g7j-8584
  • https://github.com/rails/rails Vendor— Affected Fixed in 6.1.3.2, 6.0.3.7, 5.2.4.6, 5.2.6 Fixed in — No fix listed CNA
  • actionpack (RubyGems) Vendor— Affected 6.0.0 to before 6.0.3.7 Fixed in 6.0.3.7 Patch available GHSA-7wjx-3g7j-8584
  • actionpack (RubyGems) Vendor— Affected 6.1.0 to before 6.1.3.2 Fixed in 6.1.3.2 Patch available GHSA-7wjx-3g7j-8584
  • actionpack (RubyGems) Vendor— Affected 5.2.5 to before 5.2.6 Fixed in 5.2.6 Patch available GHSA-7wjx-3g7j-8584
  • actionpack (RubyGems) Vendor— Affected 4.0.0 to before 5.2.4.6 Fixed in 5.2.4.6 Patch available GHSA-7wjx-3g7j-8584

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*before 5.2.4.6; 5.2.5 to before 5.2.6; 6.0.0 to before 6.0.3.7; 6.1.0 to before 6.1.3.2VulnerableRails
  • cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:* Versions before 5.2.4.6; 5.2.5 to before 5.2.6; 6.0.0 to before 6.0.3.7; 6.1.0 to before 6.1.3.2 Vulnerable ·Rails

Remediation

  • Fix · GHSA-7wjx-3g7j-8584 actionpack (RubyGems) Fixed in 6.0.3.7 Advisory →
  • Fix · GHSA-7wjx-3g7j-8584 actionpack (RubyGems) Fixed in 6.1.3.2 Advisory →
  • Fix · GHSA-7wjx-3g7j-8584 actionpack (RubyGems) Fixed in 5.2.6 Advisory →
  • Fix · GHSA-7wjx-3g7j-8584 actionpack (RubyGems) Fixed in 5.2.4.6 Advisory →

Red Hat 1 advisory

  • RHSA-2021:4702 Released 2021-11-16 · Red Hat rating Moderate
    Satellite 6.10 Release
    • Red Hat Satellite 6.10 candlepin-4.0.9-1.el7sat, foreman-2.5.2.17-2.el7sat, python-aiohttp-3.7.4-1.el7pc +14
    • Red Hat Satellite Capsule 6.10 foreman-2.5.2.17-2.el7sat, python-aiohttp-3.7.4-1.el7pc, python-ecdsa-0.13.3-2.el7pc +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
CloudForms Management Engine 5AffectedNo fix planned: Will not fix
Red Hat 3scale API Management Platform 2AffectedNo fix yet
Red Hat Satellite 6AffectedNo fix planned: Will not fix
Red Hat Satellite 6.10Fixed RHSA-2021:4702
Not affected: 2 products
  • Red Hat Satellite 6.10
  • Red Hat Satellite Capsule 6.10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-22904
  2. 2026-10-03 Alias added: GHSA-7wjx-3g7j-8584

References

Exploit 1

Advisory 3

Other 8

  • TI-2014-00124 Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the… KEVCVSS 3.1HIGH 7.5
  • TI-2019-03828 Path traversal in Rails https://github.com/rails/rails KEVCVSS 3.1HIGH 7.5
  • TI-2016-00672 Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x… KEVCVSS 3.1HIGH 7.5
  • TI-2019-03830 Command injection in Rails https://github.com/rails/rails CVSS 3.1CRITICAL 9.8
  • TI-2020-06581 Code injection in https://github.com/rails/rails CVSS 3.1HIGH 8.8
  • TI-2013-00091 active_support/core_ext/hash/conversions.rb in Ruby on Rails before 2.3.15, 3.0.x before… CVSS 2.0HIGH 7.5
See all 117 →

Sources

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