# CVE-2026-66066: rails: Action Pack is a framework for handling and responding to web requests

CVE-2026-66066 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-66066, released August 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-66066
- Priority: Routine
- CVSS: n/a
- EPSS: 0.3290
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 30, 2026

## Description

Action Pack is a framework for handling and responding to web requests. In versions prior to 7.2.3.2, 8.0.5.1 and 8.1.3.1, Active Storage does not disable libvips operations marked unsafe for untrusted content, allowing a crafted upload to invoke such an operation. Consuming applications are affected when configured to use libvips and accept image uploads from untrusted users. An unauthenticated attacker may exploit this behavior to read arbitrary files accessible to the Rails process, including environment variables and application secrets. Exposure of credentials such as secret_key_base or external-service tokens may enable remote code execution or lateral movement. This issue has been fixed in versions 7.2.3.2, 8.0.5.1 and 8.1.3.1.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | hawk2 opensuse-leap 16.0 | 2.7.2+git.1788518533.7d4dadd6-160000.1.1 | [OPENSUSE-SU-2026:22068-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22068-1.md) | Nov 7, 2026 |
| Linux | hawk2 sles 16.0 | 2.7.2+git.1788518533.7d4dadd6-160000.1.1 | [SUSE-SU-2026:24195-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24195-1.md) | Nov 7, 2026 |
| Linux | rails Debian 12.15 (bookworm) | 2:6.1.7.10+dfsg-1~deb12u3 | [DEBIAN-CVE-2026-66066](https://patchblox.com/security/data/fix/linux/debian-cve-2026-66066.md) | Aug 7, 2026 |
| Linux | rails Debian 13.5 (trixie) | 2:7.2.2.2+dfsg-2~deb13u2 | [DEBIAN-CVE-2026-66066](https://patchblox.com/security/data/fix/linux/debian-cve-2026-66066.md) | Aug 7, 2026 |
| Linux | rails Debian 14 | 2:7.2.3.2+dfsg-1 | [DEBIAN-CVE-2026-66066](https://patchblox.com/security/data/fix/linux/debian-cve-2026-66066.md) | Aug 7, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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