rustls 0.23.46 security fixes

{
  "id": "67ababf5e63fd554d687973a2784497300b5fc7a4f1d4b0b5d2f109c5294ad78",
  "url": "https://github.com/rustls/rustls/releases/tag/v%2F0.23.46",
  "method": "llm",
  "payload": {
    "kind": "patch",
    "title": "rustls 0.23.46 security fixes",
    "summary": "rustls 0.23.46 fixes security issues involving Brotli certificate decompression, secret data in session-value debug output, key-exchange hints, and application data sent after ECH rejection.",
    "evidence": "Security-relevant fixes: GHSA-h2v8-394m-p7vv: The built-in (but disabled by default) Brotli certificate decompression can allocate an attacker-controlled amount of memory up to 1 GiB before authentication * GHSA-c8m5-c952-6cm4: Debug impls for Tls12ClientSessionValue and Tls13ClientSessionValue include secret data * GHSA-w44r-93j7-qv28: An unauthenticated ServerHello poisons the per-name key-exchange hints, so later ClientHellos carry only a classical X25519 share. Thank you to @Adam010341 . GHSA-vp88-798v-h67f: In rustls 0.23.44 and 0.23.45, application data that a client buffers before the handshake completes is sent to the server even when the server rejects Encrypted Client Hello (ECH).",
    "products": [
      {
        "name": {
          "value": "rustls",
          "evidence": "Release notes from rustls"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "0.23.46",
            "evidence": "0.23.46"
          }
        ],
        "affected_versions": [
          {
            "value": "rustls 0.23.44 and 0.23.45",
            "evidence": "In rustls 0.23.44 and 0.23.45, application data that a client buffers before the handshake completes is sent to the server even when the server rejects Encrypted Client Hello (ECH)."
          }
        ]
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "github-rustls-rustls",
  "document_id": 22562,
  "published_at": "2026-10-14T09:51:22+00:00"
}