pgjdbc does not enforce requireAuth when the value excludes every authentication method

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-107314",
    "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
    "assignerShortName": "PostgreSQL",
    "dateUpdated": "2026-10-08T14:47:31.949Z",
    "dateReserved": "2026-10-07T16:53:39.434Z",
    "datePublished": "2026-10-07T23:03:01.500Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "shortName": "PostgreSQL",
        "dateUpdated": "2026-10-07T23:03:01.500Z"
      },
      "title": "pgjdbc does not enforce requireAuth when the value excludes every authentication method",
      "descriptions": [
        {
          "lang": "en",
          "value": "pgjdbc, the PostgreSQL JDBC Driver, versions 42.7.11 through 42.7.13 enforce no restriction when the requireAuth connection property excludes all six authentication methods the driver knows, for example requireAuth=!password,!md5,!gss,!sspi,!scram-sha-256,!none. The driver then accepts any method the server asks for, including cleartext password authentication. A value without a method in it, such as requireAuth=, (a single comma), is affected the same way. An attacker positioned between the application and its server can ask for cleartext password authentication and receive the database password. A positive list such as requireAuth=scram-sha-256, and a partial exclusion such as requireAuth=!password,!md5, are enforced correctly. The property has no default value, so a deployment that does not set it is not affected. 42.7.14 fixes the problem: such a connection is refused with SQLState 08004, and a value without a method in it is rejected as invalid."
        }
      ],
      "affected": [
        {
          "vendor": "pgjdbc",
          "product": "pgjdbc",
          "collectionURL": "https://repo.maven.apache.org/maven2",
          "packageName": "org.postgresql:postgresql",
          "programFiles": [
            "pgjdbc/src/main/java/org/postgresql/core/AuthMethod.java"
          ],
          "programRoutines": [
            {
              "name": "org.postgresql.core.AuthMethod.parseRequireAuth"
            },
            {
              "name": "org.postgresql.core.AuthMethod.checkAuth"
            }
          ],
          "repo": "https://github.com/pgjdbc/pgjdbc",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "42.7.11",
              "status": "affected",
              "versionType": "maven",
              "lessThan": "42.7.14"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-636 Not Failing Securely ('Failing Open')",
              "cweId": "CWE-636",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-rhp9-mr79-r74h",
          "tags": [
            "vendor-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM"
          }
        }
      ],
      "workarounds": [
        {
          "lang": "en",
          "value": "Replace the requireAuth value with a positive list of the methods the server uses, for example requireAuth=scram-sha-256; a positive list is enforced correctly on every affected version. A deployment that uses SCRAM over TLS can also set channelBinding=require, which refuses every authentication request other than SCRAM. Verifying the server certificate with sslmode=verify-full against a trusted CA prevents an attacker from presenting a substitute server."
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Upgrade to pgjdbc 42.7.14 or later, and replace a requireAuth value that excludes every method or names none with a positive list of the methods the server uses."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Daniel Coles",
          "type": "reporter"
        }
      ]
    },
    "adp": [
      {
        "providerMetadata": {
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP",
          "dateUpdated": "2026-10-08T14:47:31.949Z"
        },
        "title": "CISA ADP Vulnrichment",
        "metrics": [
          {}
        ]
      }
    ]
  }
}