netty netty-incubator-codec-ohttp up to 0.0.22.Final Decryption Path OHttpRequestResponseContext.java OHttpRequestResponseContext.decodeChunk allocation of resources

Summaryinfo

A vulnerability categorized as problematic has been discovered in netty netty-incubator-codec-ohttp up to 0.0.22.Final. The affected element is the function OHttpRequestResponseContext.decodeChunk of the file codec-ohttp/src/main/java/io/netty/incubator/codec/ohttp/OHttpRequestResponseContext.java of the component Decryption Path. The manipulation results in allocation of resources. This vulnerability is cataloged as CVE-2026-54251. The attack may be launched remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in netty netty-incubator-codec-ohttp up to 0.0.22.Final. Affected is the function OHttpRequestResponseContext.decodeChunk of the file codec-ohttp/src/main/java/io/netty/incubator/codec/ohttp/OHttpRequestResponseContext.java of the component Decryption Path. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-54251 since 06/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 0.0.23.Final eliminates this vulnerability.

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Productinfo

Vendor

• netty

Name

• netty-incubator-codec-ohttp

Version

• 0.0.22.Final

Website

• Product: https://github.com/netty/netty-incubator-codec-ohttp/

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