9.8

CVE-2026-33195: rails activestorage Path Traversal

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2026-33195DEBIAN-CVE-2026-33195CGA-4rhf-vcm3-vxxh
Published 23-03-2026Last modified 19-08-2026
Open JSON

Vulnerability summary

CVE-2026-33195 is a critical (CVSS 9.8) Path Traversal vulnerability in rails activestorage. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 46.5% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.58%
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-C8XW-76QM-2VGV

Timeline

  1. 23-03-2026
    PublishedVulnerability first disclosed.
  2. 19-08-2026
    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 `DiskService#path_for` does not validate that the resolved filesystem path remains within the storage root directory. If a blob key containing path traversal sequences (e.g. `../`) is used, it could allow reading, writing, or deleting arbitrary files on the server. Blob keys are expected to be trusted strings, but some applications could be passing user input as keys and would be affected. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

CVSS metrics

10 scores · 7 sources · 2 versions

EPSS trend

Probability

0.58%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

+0.01 pp

From 0.57% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.58%

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< 2:6.1.7.10+dfsg-1~deb12u3 | < 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

17 links
Show all 17 references