CVE-2026-54251
Published:September 15, 2026
Updated:September 22, 2026
netty-incubator-codec-ohttp implements Oblivious HTTP (OHTTP) gateway and client functionality using Netty. Prior to 0.0.23.Final, the OHTTP gateway decryption path in codec-ohttp/src/main/java/io/netty/incubator/codec/ohttp/OHttpRequestResponseContext.java allocates a pooled direct ByteBuf for decrypted plaintext before the AEAD tag is verified. When an invalid tag causes decryptChunk() to throw CryptoException, OHttpRequestResponseContext.decodeChunk() does not release the ByteBuf because the allocation is not guarded by try/finally. Repeated invalid encrypted requests can therefore leak native off-heap memory until the gateway is unable to continue serving requests. This issue is fixed in version 0.0.23.Final.
Affected Packages
https://github.com/netty/netty-incubator-codec-ohttp.git (GITHUB):
Affected version(s) >=netty-incubator-codec-parent-ohttp-0.0.1.Final <netty-incubator-codec-parent-ohttp-0.0.23.FinalFix Suggestion:
Update to version netty-incubator-codec-parent-ohttp-0.0.23.Finalio.netty.incubator:netty-incubator-codec-ohttp (JAVA):
Affected version(s) >=0.0.1.Final <0.0.23.FinalFix Suggestion:
Update to version 0.0.23.FinalRelated Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Improper Control of a Resource Through its Lifetime
EPSS
Base Score:
0.29