CVE-2026-53666

ADVISORY - github

Summary

If application code allows attacker supplied input to overwrite certain aspects of errors caught by the SSR process, then it was possible for attacker to trigger unexpected constructor execution on the client which would trigger outbound network traffic. This is only possible with very specific (and unlikely) application layer code.

[!NOTE] This does not impact your application if you are using Declarative Mode. This only impacts Framework Mode and Data Mode applications doing manual SSR/hydration

Common Weakness Enumeration (CWE)

ADVISORY - github

CWE-470⁠

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Impacted images

Advisories

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