CVE-2026-122006

CRITICAL 1 PoC
INFO Priority: 0.07 BB Relevance: 90/100
Published: 2026-11-04 Modified: 2026-11-12 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

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.

Affected Software (10)

VendorProductVersion
rubyonrails Active Storage 0 < 8.0.5.2
rubyonrails Active Storage 8.1 < 8.1.4.1
rubyonrails Active Storage 0 < 8.0.5.2
rubyonrails Active Storage 8.1 < 8.1.4.1
rubyonrails Active Storage 0 < 8.0.5.2
rubyonrails Active Storage 8.1 < 8.1.4.1
rubyonrails Active Storage 0 < 8.0.5.2
rubyonrails Active Storage 8.1 < 8.1.4.1
rubyonrails Active Storage 0 < 8.0.5.2
rubyonrails Active Storage 8.1 < 8.1.4.1

Bug Bounty Relevance

90 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.74%
Raw Score 0.007410
Percentile 55.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00741
2026-11-12
0.00741
2026-11-10
0.00741
2026-11-09
0.00741
2026-11-08
0.00741
2026-11-07
0.00741
2026-11-06
0.00741
2026-11-05
0.00690

Intelligence Sources

mitre ref →
nvd ref →