CVE-2026-41207
netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures
The netty incubator codec.bhttp is a java language binary http parser. Prior to version 0.0.21.Final, HKDF_expand returns non-NULL on failure. The byte[] is filled with zeros and has no way to distinguish success from failure. Since this output is used as HKDF key material for the response AEAD, a failure silently produces an all-zero key. When EVP_HPKE_CTX_export fails it also returns an empty byte[] array filled with zeros. This byte[] feeds directly into OHttpCrypto.createResponseAEAD(...). A silent all-zero export secret would produce a deterministic, attacker-predictable AEAD key. Version 0.0.21.Final patches the issue.
| CWE | CWE-330 |
| Vendor | netty |
| Product | netty-incubator-codec-ohttp |
| Published | Jun 4, 2026 |
| Last Updated | Jun 8, 2026 |
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