PT-2026-49171 · Rubylouvre · Avalon

Frederick · Published 2026-06-15 · Updated 2026-06-15 · CVE-2026-12209

Mitre

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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.

Exploit

Fix

Prototype Pollution

Code Injection

Weakness Enumeration

CWE-1321

CWE-94

Related Identifiers

CVE-2026-12209

Affected Products

Avalon

References · 6

• 🔥 https://github.com/OriginSecurityX/avalon-filter-rce · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-12209 · Security Note
• https://vuldb.com/vuln/370851/cti · Note
• https://vuldb.com/cve/CVE-2026-12209 · Note
• https://vuldb.com/vuln/370851 · Note
• https://vuldb.com/submit/832447 · Note