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6.9 Medium

CVE-2026-41207 The netty incubator codec.bhttp is a java language binary http parser

Description

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.

Affected products and versions

Product Affected versions Fixed in
netty-incubator-codec-ohttp 0.0 earliest → < 0.0.21.Final 0.0.21.Final

References

Timeline

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