Is CVE-2026-47856 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-47856?

CVE-2026-47856 has a CVSS v3 severity of MEDIUM (6.3).

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CVE-2026-47856

Description

Spring Integration's JSON to object conversion uses the json__TypeId__ header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier