RubyLouvre avalon Template Filter index.js prototype pollution
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- None · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| RubyLouvre | avalon | 2.2.0; 2.2.1; 2.2.2; 2.2.3; 2.2.4; 2.2.5; 2.2.6; 2.2.7; 2.2.8; 2.2.9; 2.2.10 | — | No fix listed | CNA |
- avalon VendorRubyLouvre Affected 2.2.0; 2.2.1; 2.2.2; 2.2.3; 2.2.4; 2.2.5; 2.2.6; 2.2.7; 2.2.8; 2.2.9; 2.2.10 Fixed in — No fix listed CNA
CPE names CNA · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:rubylouvre:avalon:*:*:*:*:*:*:*:* | — | — | RubyLouvre |
- cpe:2.3:a:rubylouvre:avalon:*:*:*:*:*:*:*:* Versions — — ·RubyLouvre
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-12209
- 2026-10-03 Alias added: GHSA-785f-3qgq-ghq3
References
Sources
- CVE-2026-12209 · CVE Program
- CVE-2026-12209 · NVD
- FIRST EPSS
- GHSA-785f-3qgq-ghq3 · GitHub Advisory Database · CC BY 4.0
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