CVE-2026-41207: CWE-330: Use of Insufficiently Random Values in netty netty-incubator-codec-ohttp
CVE-2026-41207 is a vulnerability in netty-incubator-codec-ohttp versions prior to 0. 0. 21. Final where the HKDF_expand function returns a zero-filled byte array on failure without signaling an error. This zero-filled output is used as key material for AEAD encryption, resulting in a deterministic and attacker-predictable encryption key. The issue is fixed in version 0. 0. 21. Final.
AI Analysis
Technical Summary
The netty-incubator-codec-ohttp Java binary HTTP parser prior to version 0.0.21.Final has a cryptographic weakness (CWE-330) where HKDF_expand and EVP_HPKE_CTX_export functions return zero-filled byte arrays on failure without error indication. These zero arrays are used as AEAD keys in OHttpCrypto.createResponseAEAD, causing the generation of predictable encryption keys. This undermines the confidentiality guarantees of the AEAD encryption. The vulnerability is addressed in version 0.0.21.Final.
Potential Impact
The vulnerability causes the use of deterministic, attacker-predictable AEAD keys due to silent failures producing zero-filled key material. This weakens the cryptographic strength of the response encryption, potentially allowing attackers to decrypt or forge encrypted messages if they can induce or detect the failure condition. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade netty-incubator-codec-ohttp to version 0.0.21.Final or later where this issue is fixed. Patch status is not explicitly confirmed in vendor advisories, so users should verify with the official netty project for the latest remediation guidance.
CVE-2026-41207: CWE-330: Use of Insufficiently Random Values in netty netty-incubator-codec-ohttp
Description
CVE-2026-41207 is a vulnerability in netty-incubator-codec-ohttp versions prior to 0. 0. 21. Final where the HKDF_expand function returns a zero-filled byte array on failure without signaling an error. This zero-filled output is used as key material for AEAD encryption, resulting in a deterministic and attacker-predictable encryption key. The issue is fixed in version 0. 0. 21. Final.
CVSS v4.0
Score 6.9medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The netty-incubator-codec-ohttp Java binary HTTP parser prior to version 0.0.21.Final has a cryptographic weakness (CWE-330) where HKDF_expand and EVP_HPKE_CTX_export functions return zero-filled byte arrays on failure without error indication. These zero arrays are used as AEAD keys in OHttpCrypto.createResponseAEAD, causing the generation of predictable encryption keys. This undermines the confidentiality guarantees of the AEAD encryption. The vulnerability is addressed in version 0.0.21.Final.
Potential Impact
The vulnerability causes the use of deterministic, attacker-predictable AEAD keys due to silent failures producing zero-filled key material. This weakens the cryptographic strength of the response encryption, potentially allowing attackers to decrypt or forge encrypted messages if they can induce or detect the failure condition. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade netty-incubator-codec-ohttp to version 0.0.21.Final or later where this issue is fixed. Patch status is not explicitly confirmed in vendor advisories, so users should verify with the official netty project for the latest remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-18T02:51:52.974Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a21ba77e29bf47b50be41ff
Added to database: 6/4/2026, 5:48:39 PM
Last enriched: 6/4/2026, 6:04:11 PM
Last updated: 6/4/2026, 7:21:12 PM
Views: 6
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