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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-33174 Detail

Description

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-BT 6.6 MEDIUM
Vector:  CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/rails/rails/commit/2cd933c366b777f873d4d590127da2f4a25e4ba5 GitHub, Inc.
https://github.com/rails/rails/commit/42012eaaa88dfc7d0030161b2bc8074a7bbce92a GitHub, Inc.
https://github.com/rails/rails/commit/8159a9c3de3f27a2bcf2866b8bf9ceb9075e229b GitHub, Inc.
https://github.com/rails/rails/releases/tag/v7.2.3.1 GitHub, Inc.
https://github.com/rails/rails/releases/tag/v8.0.4.1 GitHub, Inc.
https://github.com/rails/rails/releases/tag/v8.1.2.1 GitHub, Inc.
https://github.com/rails/rails/security/advisories/GHSA-r46p-8f7g-vvvg GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-789 Memory Allocation with Excessive Size Value GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-33174
NVD Published Date:
03/23/2026
NVD Last Modified:
03/23/2026
Source:
GitHub, Inc.