CVE-2026-12209CWE-1321CWE-94

RubyLouvre avalon Template Filter index.js prototype pollution

Medium · published June 15, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
23.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
EPSS
0.00314 · 23.1th percentile
Weaknesses
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'); CWE-94 · Improper Control of Generation of Code ('Code Injection')
Published
2026-06-15T02:15Z
EPSS history
Timeline
  • 15 JUN 02:15Z
    RubyLouvre avalon Template Filter index.js prototype pollution
    cvelistv5