{"api_version":"1","generated_at":"2026-06-05T09:21:44+00:00","cve":"CVE-2026-41207","urls":{"html":"https://cve.report/CVE-2026-41207","api":"https://cve.report/api/cve/CVE-2026-41207.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-41207","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-41207"},"summary":{"title":"netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures","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. 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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.","Type":"Description","Title":"netty-incubator-codec-ohttp's HPKEContext operations may produce"}]}}}