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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
RubyLouvre avalon affected
Version Status Constraints
2.2.0 affected —
2.2.1 affected —
2.2.2 affected —
2.2.3 affected —
2.2.4 affected —
2.2.5 affected —
2.2.6 affected —
2.2.7 affected —
2.2.8 affected —
2.2.9 affected —
2.2.10 affected —

No data.

No data.

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No data.

Project Subscriptions

Vendors Products
Rubylouvre Subscribe
Avalon Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/OriginSecurityX/avalon-filter-rce cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-12209 cve-icon cve-icon
https://vuldb.com/submit/832447 cve-icon cve-icon
https://vuldb.com/vuln/370851 cve-icon cve-icon
https://vuldb.com/vuln/370851/cti cve-icon cve-icon
History

Mon, 15 Jun 2026 03:00:00 +0000

Type Values Removed Values Added
Description 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.
Title RubyLouvre avalon Template Filter index.js prototype pollution
First Time appeared Rubylouvre
Rubylouvre avalon
Weaknesses CWE-1321
CWE-94
CPEs cpe:2.3:a:rubylouvre:avalon:*:*:*:*:*:*:*:*
Vendors & Products Rubylouvre
Rubylouvre avalon
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 6.9, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-06-15T02:15:07.361Z

Reserved: 2026-06-14T12:27:55.933Z

Link: CVE-2026-12209

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-06-15T03:16:24.167

Modified: 2026-06-15T03:16:24.167

Link: CVE-2026-12209

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-15T04:30:29Z

Weaknesses