Answer in brief
CVE-2026-54251 records a High severity vulnerability in netty-incubator-codec-ohttp: [OHttpServerCodec] Native Direct-Memory Leak on AEAD Decryption Failure Leads to Gateway Denial of Service. The current sources do not mark it as known exploited. The current feed maps netty/netty-incubator-codec-ohttp (generic), io.netty.incubator/netty-incubator-codec-ohttp (generic), io.netty.incubator:netty-incubator-codec-ohttp (maven), io.netty.incubator:netty-incubator-codec-ohttp (maven). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps netty/netty-incubator-codec-ohttp (generic), io.netty.incubator/netty-incubator-codec-ohttp (generic), io.netty.incubator:netty-incubator-codec-ohttp (maven), io.netty.incubator:netty-incubator-codec-ohttp (maven). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| netty/netty-incubator-codec-ohttpgeneric | < 0.0.23.Final | Not reported |
| io.netty.incubator/netty-incubator-codec-ohttpgeneric | < 0.0.23.Final | Not reported |
| io.netty.incubator:netty-incubator-codec-ohttpmaven | >=0 <0.0.23.Final | 0.0.23.Final |
| io.netty.incubator:netty-incubator-codec-ohttpmaven | <0.0.23.Final | 0.0.23.Final |
Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 20, 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.
Quoted source text, attributed separately from HOL analysis.