{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-89422",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89422",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-22T08:49:16.171Z",
    "updatedAt": "2026-09-22T13:08:15.912Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "TLS 1.3 client skips server authentication when ServerHello carries an unsolicited pre_shared_key extension",
      "summary": "Key Exchange without Entity Authentication vulnerability in Erlang/OTP ssl allows a peer that answers a TLS 1.3 client connection to impersonate the intended server. A pre_shared_key extension in the ServerHello that the client never offered causes the client to complete the handshake without validating the server's certificate, so ssl:connect returns {ok, Socket} against a peer holding no certificate, no private key and no prior session.\n\ntls_client_connection_1_3:handle_server_hello/2 passes the received extension to tls_gen_connection_1_3:handle_resumption/2, which sets resumption = true on its mere presence without checking that the client offered a PSK. tls_handshake_1_3:get_pre_shared_key/4 meanwhile falls back to the all-zero \"no PSK\" value and keys the handshake with the ordinary non-PSK schedule, so the attacker's own ephemeral key suffices. The resumption flag then routes maybe_resumption/1 straight to wait_finished, skipping the certificate-handling states, so certificate path validation, verify_fun, hostname verification, partial_chain, CRL checking and OCSP stapling are all bypassed. The default client configuration is affected; clients restricted to TLS 1.2 are not.\n\nThis issue affects OTP from OTP 22.2 before OTP 27.3.4.18, OTP 28.5.0.7, and OTP 29.1.1, corresponding to ssl from 9.5 before 11.2.12.13, 11.6.0.6, and 11.7.7.",
      "affected": [
        {
          "vendor": "Erlang",
          "product": "OTP",
          "packageName": "otp",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "22.2",
              "status": "affected",
              "versionType": "otp",
              "lessThan": "*",
              "changes": [
                {
                  "at": "27.3.4.18",
                  "status": "unaffected"
                },
                {
                  "at": "28.5.0.7",
                  "status": "unaffected"
                },
                {
                  "at": "29.1.1",
                  "status": "unaffected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "Erlang",
          "product": "OTP",
          "packageName": "ssl",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "9.5",
              "status": "affected",
              "versionType": "otp",
              "lessThan": "*",
              "changes": [
                {
                  "at": "11.2.12.13",
                  "status": "unaffected"
                },
                {
                  "at": "11.6.0.6",
                  "status": "unaffected"
                },
                {
                  "at": "11.7.7",
                  "status": "unaffected"
                }
              ]
            }
          ]
        },
        {
          "vendor": "Erlang",
          "product": "OTP",
          "packageName": "erlang/otp",
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "21b8a1b0ad0adf200682b3854bc50114ab2b8c62",
              "status": "affected",
              "versionType": "git",
              "lessThan": "*",
              "changes": [
                {
                  "at": "afec5156361bb50d3607c7c1a453c19b9149b324",
                  "status": "unaffected"
                },
                {
                  "at": "98c66c858113949c4262d26cd7d426c4b09d2b35",
                  "status": "unaffected"
                },
                {
                  "at": "fd1d9d07fc92ec0d59f96dfb66182195882bb7dd",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  }
}