CVE-2026-122006
The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
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.
- Record
CVE-2026-122006- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1188
- Updated
- 2026-11-05
EUVDEUVD-2026-116914
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.
- Record
EUVD-2026-116914- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-05
GitHub AdvisoriesGHSA-wgv4-95jc-33jm
The activestorage gem before 8.1.4.1 for Ruby on Rails, when ImageMagick attachment processing...
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.
- Record
GHSA-wgv4-95jc-33jm- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1188
- Updated
- 2026-11-05
NVD
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.
- Record
CVE-2026-122006- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1188
- Updated
- 2026-11-05
OSV
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.
- Record
CVE-2026-122006- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1188
- Updated
- 2026-11-07
OSVDEBIAN-CVE-2026-122006
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.
- Record
DEBIAN-CVE-2026-122006- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-06
OSVUBUNTU-CVE-2026-122006
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.
- Record
UBUNTU-CVE-2026-122006- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-06
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
railsDebian:12 |
All versions, plus listed versions 2:6.1.7.10+dfsg-1~deb12u12:6.1.7.10+dfsg-1~deb12u22:6.1.7.10+dfsg-1~deb12u32:6.1.7.3+dfsg-12:6.1.7.3+dfsg-10 Show 38 moreShow less2:6.1.7.3+dfsg-112:6.1.7.3+dfsg-122:6.1.7.3+dfsg-132:6.1.7.3+dfsg-22:6.1.7.3+dfsg-2~deb12u12:6.1.7.3+dfsg-32:6.1.7.3+dfsg-42:6.1.7.3+dfsg-52:6.1.7.3+dfsg-62:6.1.7.3+dfsg-72:6.1.7.3+dfsg-7~exp12:6.1.7.3+dfsg-82:6.1.7.3+dfsg-92:7.2.2.1+dfsg-12:7.2.2.1+dfsg-1~exp12:7.2.2.1+dfsg-1~exp22:7.2.2.1+dfsg-1~exp32:7.2.2.1+dfsg-1~exp42:7.2.2.1+dfsg-1~exp62:7.2.2.1+dfsg-22:7.2.2.1+dfsg-32:7.2.2.1+dfsg-42:7.2.2.1+dfsg-52:7.2.2.1+dfsg-62:7.2.2.1+dfsg-72:7.2.2.2+dfsg-12:7.2.2.2+dfsg-22:7.2.2.2+dfsg-2~deb13u12:7.2.2.2+dfsg-2~deb13u22:7.2.3+dfsg-12:7.2.3+dfsg-22:7.2.3+dfsg-32:7.2.3.1+dfsg-12:7.2.3.2+dfsg-12:7.2.3.2+dfsg-22:7.2.3.2+dfsg-32:7.2.4+dfsg-12:7.2.4+dfsg-2 |
None known |
railsDebian:13 |
All versions, plus listed versions 2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-12:7.2.2.2+dfsg-22:7.2.2.2+dfsg-2~deb13u12:7.2.2.2+dfsg-2~deb13u2 Show 9 moreShow less2:7.2.3+dfsg-12:7.2.3+dfsg-22:7.2.3+dfsg-32:7.2.3.1+dfsg-12:7.2.3.2+dfsg-12:7.2.3.2+dfsg-22:7.2.3.2+dfsg-32:7.2.4+dfsg-12:7.2.4+dfsg-2 |
None known |
railsDebian:14 |
All versions, plus listed versions 2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-12:7.2.2.2+dfsg-22:7.2.2.2+dfsg-2~deb13u12:7.2.2.2+dfsg-2~deb13u2 Show 9 moreShow less2:7.2.3+dfsg-12:7.2.3+dfsg-22:7.2.3+dfsg-32:7.2.3.1+dfsg-12:7.2.3.2+dfsg-12:7.2.3.2+dfsg-22:7.2.3.2+dfsg-32:7.2.4+dfsg-12:7.2.4+dfsg-2 |
None known |
railsUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2:4.1.10-12:4.2.5-12:4.2.5.1-12:4.2.5.2-22:4.2.6-12:4.2.6-1ubuntu0.1~esm12:4.2.6-1ubuntu0.1~esm2 |
None known |
railsUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2:4.2.9-22:4.2.9-42:4.2.10-0ubuntu42:4.2.10-0ubuntu4+esm12:4.2.10-0ubuntu4+esm2 |
None known |
railsUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 2:5.2.2.1+dfsg-1ubuntu12:5.2.3+dfsg-32:5.2.3+dfsg-3ubuntu0.1~esm1 |
None known |
railsUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 2:6.0.3.7+dfsg-22:6.1.4.1+dfsg-8ubuntu22:6.1.4.1+dfsg-8ubuntu2+esm1 |
None known |
railsUbuntu:24.04:LTS |
All versions, plus listed versions 2:6.1.7.3+dfsg-2build12:6.1.7.3+dfsg-3 |
None known |
railsUbuntu:26.10 |
All versions, plus listed versions 2:7.2.3+dfsg-22:7.2.3.2+dfsg-2 |
None known |
railsUbuntu:26.04:LTS |
All versions, plus listed versions 2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-22:7.2.3+dfsg-2 |
None known |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | charlie-goldenowl/cve-2026-122006-check | 2026-11-05 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| affected, aliases, references | OSV | |
| references | EUVD, GitHub Advisories, NVD, OSV | |
| exploits, facts, references | CVE List, PoC in GitHub | |
| references | OSV | |
| aliases, references | EUVD, NVD, OSV | |
| references | CVE List | |
| references | CVE List, EUVD, GitHub Advisories, NVD | |
| published | EUVD, NVD | |
| published | EUVD | |
| aliases, references, title | GitHub Advisories | |
| cwes, severity | CVE List | |
| first indexed | EUVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-122006 is a critical vulnerability (CVSS 9.8) in Rubyonrails Active Storage, published November 4, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.74%, the 54th percentile. No source names a fixed version.
References
github.com/rails/rails/security/advisories/GHSA-f3w6-w445-fwh9