CVE-2026-12256
High
Description
Deserialization of Untrusted Data vulnerability in ThemeFusion Fusion Builder fusion-builder allows Object Injection.This issue affects Fusion Builder: from n/a through 3.15.3.
SeverityHigh
CVSS8.8
Exploit probability—
ProductFusion Builder
PublishedJun 17, 2026
First seenJun 17, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| ThemeFusion Fusion Builder | v ≤ 3.15.3 | — |
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