CVE-2024-47887

Action Pack is a framework for handling and responding to web requests. Starting in version 4.0.0 and prior to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, and 7.2.1.1, there is a possible ReDoS vulnerability in Action Controller's HTTP Token authentication. For applications using HTTP Token authentication via `authenticate_or_request_with_http_token` or similar, a carefully crafted header may cause header parsing to take an unexpected amount of time, possibly resulting in a DoS vulnerability. All users running an affected release should either upgrade to versions 6.1.7.9, 7.0.8.5, 7.1.4.1, or 7.2.1.1 or apply the relevant patch immediately. One may choose to use Ruby 3.2 as a workaround.Ruby 3.2 has mitigations for this problem, so Rails applications using Ruby 3.2 or newer are unaffected. Rails 8.0.0.beta1 depends on Ruby 3.2 or greater so is unaffected.

• CWE-1333

• https://github.com/rails/rails/commit/56b2fc3302836405b496e196a8d5fc0195e55049
• https://github.com/rails/rails/commit/7c1398854d51f9bb193fb79f226647351133d08a
• https://github.com/rails/rails/commit/8e057db25bff1dc7a98e9ae72e0083825b9ac545
• https://github.com/rails/rails/commit/f4dc83d8926509d0958ec21fcdbc2e7df3d32ce2
• https://github.com/rails/rails/security/advisories/GHSA-vfg9-r3fq-jvx4

Published

Oct 16, 2024

Last Modified

Jun 17, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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