CVE-2026-41207

MEDIUM EPSS 9.2%
Published Jun 4, 20263w ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published Jun 4, 2026 3w ago
Last Modified Jun 17, 2026 2w ago

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. Version 0.0.21.Final patches the issue.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
9.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-330

Affected Products 1

VendorProductVersionRange
nettynetty-incubator-codec-ohttp* <0.0.21

References 2

  • github.com https://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680
    Patch
  • github.com https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-f659-372h-6x3x
    Vendor Advisory

Remediation

  • github.com https://github.com/netty/netty-incubator-codec-ohttp/commit/3d3b4e527fc82ad0fe3db1af951ffd0ec9a10680
    Patch