{"id":"CVE-2026-41207","aliases":["GHSA-f659-372h-6x3x"],"url":"https://o3.security/vulnerability/CVE-2026-41207","summary":"netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures","details":"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.","published":"2026-06-04T17:22:35.742Z","modified":"2026-08-12T16:25:10.431022Z","cvss":null,"epss":{"score":0.00193,"percentile":0.09301,"asOf":"2026-08-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"io.netty.incubator:netty-incubator-codec-ohttp","fixedVersion":"0.0.21.Final"}],"fix":{"url":"https://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680","label":"netty/netty-incubator-codec-ohttp@3d3b4e5"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/41xxx/CVE-2026-41207.json"},{"type":"ADVISORY","url":"https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-f659-372h-6x3x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41207"},{"type":"FIX","url":"https://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:25:10.431022Z"}}