CVE-2026-41207
netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures
Description
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.
How to fix CVE-2026-41207
To remediate CVE-2026-41207, upgrade the affected package to a fixed version below.
- Maven/io.netty.incubator:netty-incubator-codec-ohttp—upgrade to 0.0.21.Final or later
Is CVE-2026-41207 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-41207.
Affected packages (1)
- from 0, < 0.0.21.Final
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |