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CVE-2026-56862 Limit handshake messages we are willing to accept post-handshake in crypto/tls

🗓️ 13 Aug 2026 21:58:53Reported by GoType 
cvelist
 cvelist
🔗 www.cve.org👁 38 Views

crypto/tls allows unbounded KeyUpdate messages post-handshake, enabling indefinite key derivation and DoS.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
osv
OSV
MINI-RWGM-4387-5WXQ
16 Aug 202613:31
osv
osv
OSV
MINI-RWMH-5CH3-8R37
15 Aug 202607:50
osv
osv
OSV
MINI-RWQ5-5P24-HR6H
17 Aug 202619:45
osv
osv
OSV
MINI-RWWF-RHJ7-PC8G
17 Aug 202607:32
osv
osv
OSV
MINI-RWXJ-8WHG-G2PV
16 Aug 202607:27
osv
osv
OSV
MINI-RX9X-HVGR-GCWX
15 Aug 202600:10
osv
osv
OSV
MINI-RXM4-439H-QJJW
17 Aug 202613:40
osv
osv
OSV
MINI-V23Q-8H74-8GRV
15 Aug 202619:31
osv
osv
OSV
MINI-V23Q-955F-XGX6
16 Aug 202607:27
osv
osv
OSV
MINI-V2GC-326V-HMPV
15 Aug 202607:50
osv
Rows per page
[
  {
    "vendor": "Go standard library",
    "product": "crypto/tls",
    "collectionURL": "https://pkg.go.dev",
    "packageName": "crypto/tls",
    "versions": [
      {
        "version": "0",
        "lessThan": "1.25.13",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "1.26.0-0",
        "lessThan": "1.26.6",
        "status": "affected",
        "versionType": "semver"
      },
      {
        "version": "1.27.0-0",
        "lessThan": "1.27.0-rc.3",
        "status": "affected",
        "versionType": "semver"
      }
    ],
    "programRoutines": [
      {
        "name": "Conn.readRecordOrCCS"
      },
      {
        "name": "Conn.Handshake"
      },
      {
        "name": "Conn.HandshakeContext"
      },
      {
        "name": "Conn.Read"
      },
      {
        "name": "Conn.Write"
      },
      {
        "name": "Dial"
      },
      {
        "name": "DialWithDialer"
      },
      {
        "name": "Dialer.Dial"
      },
      {
        "name": "Dialer.DialContext"
      },
      {
        "name": "QUICConn.HandleData"
      },
      {
        "name": "QUICConn.Start"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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