CVE-2026-54251
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk41th percentile - higher than 41% of all known CVEs
Summary
netty-incubator-codec-ohttp prior to 0.0.23.Final allocates a pooled direct ByteBuf for decrypted plaintext before the AEAD tag is verified. When an invalid tag causes a CryptoException, the buffer is not released, leading to native off-heap memory leaks on repeated invalid requests.
Risk Assessment
Repeated invalid requests can exhaust the OHTTP gateway's off-heap memory, preventing it from serving further requests and causing a denial of service.
Recommendation
Upgrade netty-incubator-codec-ohttp to version 0.0.23.Final or later. Monitor native memory usage of the OHTTP gateway to detect exploitation attempts.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

