{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-6668",
        "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "state": "PUBLISHED",
        "assignerShortName": "PostgreSQL",
        "dateReserved": "2026-04-20T12:25:46.351Z",
        "datePublished": "2026-09-23T16:04:47.158Z",
        "dateUpdated": "2026-09-23T16:46:13.834Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
                "shortName": "PostgreSQL",
                "dateUpdated": "2026-09-23T16:04:47.158Z"
            },
            "title": "Integer overflow causes an infinite loop in packet buffer growth in PgBouncer",
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is killed. Both unauthenticated and authenticated code paths can reach the overflow."
                }
            ],
            "affected": [
                {
                    "defaultStatus": "unaffected",
                    "product": "PgBouncer",
                    "vendor": "n/a",
                    "versions": [
                        {
                            "version": "0",
                            "lessThanOrEqual": "1.25.2",
                            "versionType": "semver",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-190",
                            "type": "CWE",
                            "description": "Integer Overflow or Wraparound"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "lang": "en",
                            "cweId": "CWE-835",
                            "type": "CWE",
                            "description": "Loop with Unreachable Exit Condition ('Infinite Loop')"
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://www.pgbouncer.org/changelog.html"
                }
            ],
            "metrics": [
                {
                    "format": "CVSS",
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    }
                }
            ],
            "configurations": [
                {
                    "lang": "en",
                    "value": "max_packet_size is left at its default of 2147483647 (default configuration), which is what permits a packet large enough to reach the overflow. No other non-default configuration is required."
                }
            ],
            "workarounds": [
                {
                    "lang": "en",
                    "value": "Set max_packet_size well below 1073741824 so that no single packet can grow a packet buffer past the overflow threshold"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Thanks to @var77 for finding and reporting this issue.",
                    "type": "finder"
                }
            ]
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2026-6668",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-09-23T16:33:22.320321Z"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-09-23T16:46:13.834Z"
                }
            }
        ]
    }
}