JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

The current feed maps Spring/Spring Integration (generic). Check affected ranges and fixed versions before updating.

Recommended response

1. 1Check inventory. Check lockfiles and deployed manifests for Spring/Spring Integration.
2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

1. Published upstream

   Aug 26, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Aug 26, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Aug 27, 2026

Sources and claim methodology

• Source referencespring.io

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