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CVE-2026-97031 Reject malformed ECH outer extension references in crypto/tls

🗓️ 08 Oct 2026 22:53:58Reported by GoType 
cvelist
 cvelist
🔗 www.cve.org👁 111 Views

Memory exhaustion in the crypto/tls server process via multiple ECH references.

Related
Affected
Refs
[
  {
    "vendor": "Go standard library",
    "product": "crypto/tls",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "crypto/tls",
    "versions": [
      {
        "version": "0",
        "lessThan": "1.26.9",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "1.27.0-0",
        "lessThan": "1.27.2",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "decodeInnerClientHello"
      },
      {
        "name": "Conn.Handshake"
      },
      {
        "name": "Conn.HandshakeContext"
      },
      {
        "name": "Conn.Read"
      },
      {
        "name": "Conn.Write"
      },
      {
        "name": "Dial"
      },
      {
        "name": "DialWithDialer"
      },
      {
        "name": "Dialer.Dial"
      },
      {
        "name": "Dialer.DialContext"
      },
      {
        "name": "QUICConn.Start"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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08 Oct 2026 22:53Current
CVSS 3.17.5
EPSS0.00519
SSVC
111