7.5

CVE-2026-33174: rails activestorage

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-33174DEBIAN-CVE-2026-33174CGA-6rm2-h6xc-4cqg
Published 23-03-2026Last modified 24-03-2026
Open JSON

Vulnerability summary

CVE-2026-33174 is a high (CVSS 7.5) vulnerability in rails activestorage. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.62%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-457J-WV38-43G8

Timeline

  1. 23-03-2026
    PublishedVulnerability first disclosed.
  2. 24-03-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

9 scores · 7 sources · 2 versions

EPSS trend

Probability

0.62%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.01 pp

From 0.61% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.62%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard26 products
  • gitlab-rails-ce-18.1All versions (No fix recorded)
  • gitlab-rails-ce-18.10< 18.10.3-r1
  • gitlab-rails-ce-18.2All versions (No fix recorded)
  • gitlab-rails-ce-18.3All versions (No fix recorded)
  • gitlab-rails-ce-18.4All versions (No fix recorded)
Debian1 product
  • rails< 2:7.2.2.2+dfsg-2~deb13u2 | < 2:7.2.3.1+dfsg-1
Rails1 product
  • activestorage≥ 8.1.0.beta1, < 8.1.2.1 | ≥ 8.0.0.beta1, < 8.0.4.1 | < 7.2.3.1
RubyGems1 product
  • activestorage≥ 8.1.0.beta1, < 8.1.2.1 | ≥ 8.0.0.beta1, < 8.0.4.1 | < 7.2.3.1
Rubyonrails1 product
  • rails< 7.2.3.1 | ≥ 8.0.0, < 8.0.4.1 | ≥ 8.1.0, < 8.1.2.1
Ubuntu1 product
  • railsAll versions (No fix recorded)
Wolfi1 product
  • ruby3.2-rails-8.1< 8.1.3-r0

7 vendors · 32 products

References

14 links
Show all 14 references