# CVE-2026-122006: CVE-2026-122006

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- rubyonrails / Active Storage (activestorage): ≥ 0; < 8.0.5.2 (affected, custom); ≥ 8.1; < 8.1.4.1 (affected, custom). Source: CNA: mitre

## Severity and prioritization

- 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; source: CNA: mitre

- 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; source: NVD: cve@mitre.org

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-1188

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/rails/rails/security/advisories/GHSA-f3w6-w445-fwh9 (CNA: mitre)

- https://github.com/rails/rails/releases/tag/v8.1.4.1 (CNA: mitre)

- https://github.com/rails/rails/releases/tag/v8.0.5.2 (CNA: mitre)

- https://github.com/digitalocean/droplet-1-clicks/pull/488 (ADP: CVE)

- https://github.com/rubysec/ruby-advisory-db/pull/1300 (ADP: CVE)

- https://github.com/rails/rails/releases/tag/v8.0.5.2 (cve@mitre.org)

- https://github.com/rails/rails/releases/tag/v8.1.4.1 (cve@mitre.org)

- https://github.com/rails/rails/security/advisories/GHSA-f3w6-w445-fwh9 (cve@mitre.org)

## Provenance

- CNA: mitre: https://www.cve.org/CVERecord?id=CVE-2026-122006; retrieved 2026-11-04; source updated 2026-11-04

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-122006; retrieved 2026-11-04; source updated 2026-11-04

Revision: b83d742e946aab155f6395cdd71a57ba7898b3bff016df983db7d00b8af78195

Canonical: https://y2.dev/cve/CVE-2026-122006

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