CVE-2026-33195

criticalpriority · track · 39EPSS 0.006 · 47 %ileDEEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.58% (47th) EPSS

CVSS 9.8 · critical

Is it mine?

18 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-23

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

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 8–9.8

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.1criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.18.1highCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:Nsecondaryexploitability 1.7 · impact 5.8

v4.08highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:Usecondary · ENISA EU

v4.08highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · security-advisories@github.com

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USCWE-22USCWE-22US

affected products (18)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
HCL BigFix≤ Compliance <2.0.18cert_bundDE
Open Source Ruby on Rails< 7.2.3.1cert_bundDE
Open Source Ruby on Rails< 8.0.4.1cert_bundDE
Open Source Ruby on Rails< 8.1.2.1cert_bundDE
rails activestorage≤ < 7.2.3.1enisa_euvdEU
rails activestorage8.0.0.beta1, → 8.0.4.1enisa_euvdEU
rails activestorage8.1.0.beta1, → 8.1.2.1enisa_euvdEU
Rails Core Team Active Storage≤ 6.1.7.6fstec_bduRU
Red Hat Inc. Red Hat 3scale API Management Platform≤ 2fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 8.0fstec_bduRU
rubyonrails rails< 7.2.3.1nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails8.0.0 → 8.0.4.1nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails8.1.0 → 8.1.2.1nvdUScpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
RubyGems activestorage< 7.2.3.1osvUSpkg:gem/activestorage
RubyGems activestorage8.0.0.beta1 → 8.0.4.1osvUSpkg:gem/activestorage
RubyGems activestorage8.1.0.beta1 → 8.1.2.1osvUSpkg:gem/activestorage

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-0833Ruby on Rails: Mehrere SchwachstellenDeutsch2026-03-23csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Ruby on Rails ausnutzen, um einen Denial of Service Angriff durchzuführen, um Dateien zu manipulieren, und um einen Cross-Site Scripting Angriff durchzuführen.
WID-SEC-W-2026-1687IBM License Metric Tool: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2026-05-26csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM License Metric Tool ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.
GHSA-9xrj-h377-fr87Rails Active Storage has possible Path Traversal in DiskService2026-03-23ghsa · osvUS
### Impact 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. ### Releases The fixed releases are available at the normal locations. ### Credit This issue was responsibly reported by Hackerone researcher [ksw9722](https://hackerone.com/ksw9722).

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund nvd osv NVD CVE.org MITRE

published 2026-03-24modified 2026-07-15

references (26)

External citations — patches, advisories, analysis.

scry

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