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CVE-2024-47887

Action Controller has possible ReDoS vulnerability in HTTP Token authentication

MEDIUM
6.6
CVSS Score
Published: October 16, 2024 at 08:02 PM UTC
Updated: June 17, 2026 at 07:57 AM UTC
2 products affected across 2 vendorsRailsRails

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Severity
MEDIUM6.6
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Rails· Rails
60%
v < 6.1.7.9v < 7.0.8.5v < 7.1.4.1v < 7.2.1.1
Affected range stops below 6.1.7.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.8.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.4.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.2.1.1, so it looks safe — our inference, not a vendor statement
Rails· Rubyonrails
60%
4.0.0 ≤ v < 6.1.7.97.0.0 ≤ v < 7.0.8.57.1.0 ≤ v < 7.1.4.17.2.0 ≤ v < 7.2.1.14.0.07.0.07.1.07.2.0
Affected range stops below 6.1.7.9, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.0.8.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.1.4.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.2.1.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

x_refsource_MISC
Source: [email protected]
https://github.com/rails/rails/commit/56b2fc3302836405b496e196a8d5fc0195e55049
x_refsource_MISC
Source: [email protected]
https://github.com/rails/rails/commit/7c1398854d51f9bb193fb79f226647351133d08a
x_refsource_MISC
Source: [email protected]
https://github.com/rails/rails/commit/8e057db25bff1dc7a98e9ae72e0083825b9ac545
x_refsource_MISC
Source: [email protected]
https://github.com/rails/rails/commit/f4dc83d8926509d0958ec21fcdbc2e7df3d32ce2
x_refsource_CONFIRM
Source: [email protected]
https://github.com/rails/rails/security/advisories/GHSA-vfg9-r3fq-jvx4

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.6MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-1333

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