GHSA-VMR9-J6WF-PMH2

Vulnerability from github – Published: 2026-08-20 18:39 – Updated: 2026-08-20 18:39
VLAI
Summary
netty-incubator-codec-ohttp: [OHttpServerCodec] Native Direct-Memory Leak on AEAD Decryption Failure Leads to Gateway Denial of Service
Details

The netty-incubator-codec-ohttp library implements Oblivious HTTP (OHTTP) gateway and client functionality using Netty's ByteBuf memory management. When an OHTTP gateway processes encrypted client requests, it allocates a pooled direct (native off-heap) ByteBuf to hold the decrypted plaintext before the AEAD tag is verified. If the AEAD tag check fails — meaning the ciphertext is invalid — the decryption method throws a CryptoException, but the allocated buffer is never released because no try/finally block guards the allocation.

Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Maven",
        "name": "io.netty.incubator:netty-incubator-codec-ohttp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.0.23.Final"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54251"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-664"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-20T18:39:50Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "The **netty-incubator-codec-ohttp** library implements Oblivious HTTP (OHTTP) gateway and client functionality using Netty\u0027s `ByteBuf` memory management. When an OHTTP gateway processes encrypted client requests, it allocates a pooled direct (native off-heap) `ByteBuf` to hold the decrypted plaintext before the AEAD tag is verified. If the AEAD tag check fails \u2014 meaning the ciphertext is invalid \u2014 the decryption method throws a `CryptoException`, but the allocated buffer is never released because no `try/finally` block guards the allocation.",
  "id": "GHSA-vmr9-j6wf-pmh2",
  "modified": "2026-08-20T18:39:50Z",
  "published": "2026-08-20T18:39:50Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-vmr9-j6wf-pmh2"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/netty/netty-incubator-codec-ohttp"
    },
    {
      "type": "WEB",
      "url": "https://github.com/netty/netty-incubator-codec-ohttp/releases/tag/netty-incubator-codec-parent-ohttp-0.0.23.Final"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "netty-incubator-codec-ohttp: [OHttpServerCodec] Native Direct-Memory Leak on AEAD Decryption Failure Leads to Gateway Denial of Service"
}



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