Ruby on Rails: Schwachstelle ermöglicht Offenlegung von Informationen
WID-SEC-2026-2574 · first 30.07.2026 · updated 21.10.2026 · CVSS 10,0
What it is about
Ruby on Rails ist ein in der Programmiersprache Ruby geschriebenes und quelloffenes Web Application Framework. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Ruby on Rails ausnutzen, um Informationen offenzulegen, was möglicherweise zur Remote-Codeausführung oder zu lateraler Bewegung führen kann.
Under what conditions?
Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.
What can happen in the worst case
An attacker could use the vulnerability to
- Informationen offenzulegen
- was möglicherweise zur Remote-Codeausführung oder zu lateraler Bewegung führen kann
Am I affected?
Affected according to the BSI:
- Debian Linux
- SUSE Linux
- SUSE openSUSE
- Open Source Ruby on Rails <7.2.3.2
- Open Source Ruby on Rails <8.0.5.1
- Open Source Ruby on Rails <8.1.3.1
- Open Source Ruby on Rails libvips <8.13
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Open Source Ruby on Rails 7.2.3.2
- Open Source Ruby on Rails 8.0.5.1
- Open Source Ruby on Rails 8.1.3.1
- Open Source Ruby on Rails libvips 8.13
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- Rails Vulnerability vom 2026-07-29 discuss.rubyonrails.org
- Rails Release Notes vom 2026-07-29 rubyonrails.org
- GitHub Security Advisory GHSA-xr9x-r78c-5hrm vom 2026-07-29 github.com
- Metasploit CVE-2026-66066 github.com
- Debian Security Advisory DSA-6546 vom 2026-10-07 security-tracker.debian.org
- Debian Security Advisory DLA-4829 vom 2026-10-08 lists.debian.org
- openSUSE Security Update OPENSUSE-SU-2026:22068-1 vom 2026-10-18 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:24250-1 vom 2026-10-20 lists.suse.com
CVE: CVE-2026-66066
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.