CVE-2026-122006: rubyonrails active storage

Received

Published 04-11-2026Last modified 04-11-2026

Vulnerability summary

CVE-2026-122006 is a critical (CVSS 9.8) vulnerability in rubyonrails active storage.

Priority

Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS not yet published

Source freshness unavailable

How is this decided?

CVSS score

9.8/10

010

Critical · v3.1 (CVE.org)

EPSS scoreNot scoredRisk metrics not yet published.

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

04-11-2026
PublishedVulnerability first disclosed.
04-11-2026
Last modifiedVulnerability information updated.

Description

The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing occurs, can allow server read and write operations (e.g., reading secret_key_base) because the ImageMagick analyzer runs when a file is attached, and there is not an ImageMagick security policy to block unintended functionality.

CVSS metrics

2 scores · 2 sources · 1 version

v3.19.8

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-1188Initialization of a Resource with an Insecure DefaultThe product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Rubyonrails1 product

active storage< 8.0.5.2 | ≥ 8.1, < 8.1.4.1

1 vendor · 1 product

References

4 links