CVE-2026-41207
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.
- Score
- CVSS 4.0 6.9 Medium
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-06-04
- Last modified
- 2026-06-08
- Weaknesses
- CWE-330
Affected products
References
- https://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680
- https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-f659-372h-6x3x
