6.5

CVE-2026-33658: rails activestorage

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-33658DEBIAN-CVE-2026-33658CGA-2qq7-wxj2-j3pw
Published 26-03-2026Last modified 30-03-2026
Open JSON

Vulnerability summary

CVE-2026-33658 is a medium (CVSS 6.5) vulnerability in rails activestorage. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.4% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.43%
0%100%
Low · 0.00 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-P99V-XX9P-WV64

Timeline

  1. 26-03-2026
    PublishedVulnerability first disclosed.
  2. 30-03-2026
    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 Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS metrics

9 scores · 6 sources · 2 versions

EPSS trend

Probability

0.43%

Chance of exploitation in the next 30 days

Percentile

36%

Versus all other CVEs

30-day change

0.00 pp

From 0.43% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.43%

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

Chainguard25 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, < 8.1.2.1 | ≥ 8.0.0, < 8.0.4.1 | < 7.2.3.1
RubyGems1 product
  • activestorage≥ 8.1.0, < 8.1.2.1 | ≥ 8.0.0, < 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)

6 vendors · 30 products

References

11 links
Show all 11 references