RCE in Rubylouvre Avalon
CVE-2026-12209
A security vulnerability has been detected in RubyLouvre avalon up to 2.2.10. The impacted element is an unknown function of the file src/filters/index.js of the component Template Filter Handler. Such manipulation leads to improperly controlled modification of object prototype attributes. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: RCE (Remote Code Execution)
EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
Affected products
- Rubylouvre Avalon — versions 2.2.0, 2.2.1, 2.2.2
Weakness classification (CWE)
References
- cna@vuldb.com (exploit)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (vdb-entry)
- cna@vuldb.com (signature, permissions-required)
Frequently asked questions
- What is CVE-2026-12209?
- CVE-2026-12209 is a medium-severity vulnerability in Rubylouvre Avalon, classified under Code Injection. CVSS score: 5.3/10. Published 2026-06-15.
- How severe is CVE-2026-12209?
- Medium severity. CVSS v3 base score is 5.3 out of 10.