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CVE-2026-12209

MEDIUM Exploitation: PoC
5.3
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-12209
State
PUBLISHED
Assigner
VulDB
Reserved
2026-06-14 12:27 UTC
Published
2026-06-15 02:15 UTC
Last updated
2026-06-15 12:52 UTC
Primary CWE
CWE-1321
Improperly Controlled Modification of Object Prototype Attri…
Vendor / Product
RubyLouvre / avalon
Sources
cve.org  ·  NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1
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
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
RubyLouvre avalon — 2.2.0, 2.2.1, 2.2.2, 2.2.3 …
Weakness (CWE)
CWESourceDescription
CWE-1321 cna Improperly Controlled Modification of Object Prototype Attributes
CWE-94 cna Code Injection
CVSS scores (4)
ScoreSeverityVersionSourceVector
6.9 MEDIUM 4.0 cna 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
5.3 MEDIUM 3.1 cna 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
5.3 MEDIUM 3.0 cna 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
5.0 N/D 2.0 cna AV:N/AC:L/Au:N/C:N/I:P/A:N/E:POC/RL:ND/RC:UR
References (5)
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