netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | io.netty.incubator:netty-incubator-codec-ohttp | < 0.0.21.Final | 0.0.21.Final |
References
- CVSS vector
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- Weakness (CWE)
CWE-330- Platform
- Java / Kotlin (Maven)
- Package
io.netty.incubator:netty-incubator-codec-ohttp- Disclosed
- 26.05.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-f659-372h-6x3x - CC BY 4.0
Vulnerability history: io.netty.incubator:netty-incubator-codec-ohttp
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 06.2024 08.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 3
Disclosures per year
- 2024: 1
- 2025: 0
- 2026: 3
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netty-incubator-codec-ohttp's HPKEContext operations may produce empty byte[] on failures this entry
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