cve-2026-19888

HIGH CVSS 7.5 opencve
Description

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.

Timeline
Published
2026-09-23 17:17 UTC
Last Modified
2026-09-23
CVSS Details

CVSS details not available.

Affected Products

No product information available.

Weaknesses (CWE)
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H mitre
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H nvd
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H opencve
References

No references available.

Linked Vulnerabilities

No linked vulnerabilities found.

{
  "cve": "CVE-2026-19888",
  "enrichment": {
    "affected": [
      {
        "configurations": [
          {
            "platform": null,
            "status": "affected",
            "versions": {
              "scheme": "generic",
              "value": "[0,1.25.2]"
            }
          }
        ],
        "enrichment": {
          "confidence": 95.0,
          "confidence_source": "inferred",
          "scores": [
            {
              "score": 95.0,
              "source": "inferred"
            },
            {
              "score": 100.0,
              "source": "matching"
            }
          ]
        },
        "original": {
          "product": "PgBouncer",
          "source": "cna",
          "vendor": "n/a"
        },
        "product": "pgbouncer",
        "vendor": "pgbouncer"
      }
    ],
    "created": "2026-09-23T17:45:07.975800+00:00",
    "updated": "2026-09-23T18:30:06.735969+00:00",
    "vendors": [
      "pgbouncer",
      "pgbouncer$PRODUCT$pgbouncer"
    ]
  },
  "mitre": {
    "cpes": [],
    "created": "2026-09-23T16:04:48.392000+00:00",
    "description": "Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 7.5,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
      },
      "cvssV4_0": {}
    },
    "mitre_repo_path": "cves/2026/19xxx/CVE-2026-19888.json",
    "references": [
      "https://www.pgbouncer.org/changelog.html"
    ],
    "title": "NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer",
    "updated": "2026-09-23T16:46:13.585000+00:00",
    "vendors": [],
    "weaknesses": [
      "CWE-476"
    ]
  },
  "nvd": {
    "cpes": [],
    "created": "2026-09-23T17:17:14.917000+00:00",
    "description": "Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {
        "score": 7.5,
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
      },
      "cvssV4_0": {}
    },
    "nvd_repo_path": "2026/CVE-2026-19888.json",
    "references": [
      "https://www.pgbouncer.org/changelog.html"
    ],
    "title": null,
    "updated": "2026-09-23T19:40:10+00:00",
    "vendors": [],
    "weaknesses": [
      "CWE-476"
    ]
  },
  "opencve": {
    "changes": [
      {
        "created": "2026-09-23T16:30:00+00:00",
        "data": [
          {
            "details": {
              "new": "Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.",
              "old": null
            },
            "type": "description"
          },
          {
            "details": {
              "new": "NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer",
              "old": null
            },
            "type": "title"
          },
          {
            "details": {
              "added": [
                "CWE-476"
              ],
              "removed": []
            },
            "type": "weaknesses"
          },
          {
            "details": {
              "added": [
                "https://www.pgbouncer.org/changelog.html"
              ],
              "removed": []
            },
            "type": "references"
          },
          {
            "details": {
              "added": {
                "cvssV3_1": {
                  "score": 7.5,
                  "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
                }
              },
              "removed": {},
              "updated": {}
            },
            "type": "metrics"
          }
        ],
        "id": "5d396ff6-0352-425b-849c-528163dfa965"
      },
      {
        "created": "2026-09-23T17:30:00+00:00",
        "data": [
          {
            "details": {
              "added": {
                "ssvc": {
                  "options": {
                    "Automatable": "yes",
                    "Exploitation": "none",
                    "Technical Impact": "partial"
                  },
                  "version": "2.0.3"
                }
              },
              "removed": {},
              "updated": {}
            },
            "type": "metrics"
          }
        ],
        "id": "c34757c9-e3e0-4d4b-9d94-939fda670595"
      },
      {
        "created": "2026-09-23T18:45:00+00:00",
        "data": [
          {
            "details": [
              "pgbouncer",
              "pgbouncer$PRODUCT$pgbouncer"
            ],
            "type": "first_time"
          },
          {
            "details": {
              "added": [
                "pgbouncer",
                "pgbouncer$PRODUCT$pgbouncer"
              ],
              "removed": []
            },
            "type": "vendors"
          }
        ],
        "id": "41a4849f-5294-4761-93bd-ebac1ef3f2b8"
      }
    ],
    "cpes": {
      "data": [],
      "providers": []
    },
    "created": {
      "data": "2026-09-23T16:04:48.392000+00:00",
      "provider": "mitre"
    },
    "description": {
      "data": "Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.",
      "provider": "mitre"
    },
    "metrics": {
      "cvssV2_0": {
        "data": {},
        "provider": null
      },
      "cvssV3_0": {
        "data": {},
        "provider": null
      },
      "cvssV3_1": {
        "data": {
          "score": 7.5,
          "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        },
        "provider": "mitre"
      },
      "cvssV4_0": {
        "data": {},
        "provider": null
      },
      "epss": {
        "data": {},
        "provider": null
      },
      "kev": {
        "data": {},
        "provider": null
      },
      "ssvc": {
        "data": {
          "options": {
            "Automatable": "yes",
            "Exploitation": "none",
            "Technical Impact": "partial"
          },
          "version": "2.0.3"
        },
        "provider": "vulnrichment"
      },
      "threat_severity": {
        "data": null,
        "provider": null
      }
    },
    "references": {
      "data": [
        "https://www.pgbouncer.org/changelog.html"
      ],
      "providers": [
        "mitre",
        "nvd"
      ]
    },
    "title": {
      "data": "NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer",
      "provider": "mitre"
    },
    "updated": {
      "data": "2026-09-23T18:30:06.735969+00:00",
      "provider": "enrichment"
    },
    "vendors": {
      "data": [
        "pgbouncer",
        "pgbouncer$PRODUCT$pgbouncer"
      ],
      "providers": [
        "enrichment"
      ]
    },
    "weaknesses": {
      "data": [
        "CWE-476"
      ],
      "providers": [
        "mitre",
        "nvd"
      ]
    }
  },
  "vulnrichment": {
    "cpes": [],
    "created": "2026-09-23T16:04:48.392000+00:00",
    "description": "Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.",
    "metrics": {
      "cvssV2_0": {},
      "cvssV3_0": {},
      "cvssV3_1": {},
      "cvssV4_0": {},
      "kev": {},
      "ssvc": {
        "options": {
          "Automatable": "yes",
          "Exploitation": "none",
          "Technical Impact": "partial"
        },
        "version": "2.0.3"
      }
    },
    "references": [],
    "title": "NULL pointer dereference in SCRAM client-final-message parsing in PgBouncer",
    "updated": "2026-09-23T16:36:44.516000+00:00",
    "vendors": [],
    "vulnrichment_repo_path": "2026/19xxx/CVE-2026-19888.json",
    "weaknesses": []
  }
}
View JSON API Download JSON