CVE-2026-6664 (GCVE-0-2026-6664)
Vulnerability from cvelistv5
Published
2026-05-09 00:43
Modified
2026-05-11 14:28
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-190 - Integer Overflow or Wraparound
Summary
An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet.
References
Impacted products
Vendor Product Version
n/a PgBouncer Version: 0   ≤
Show details on NVD website

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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-6664",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T14:28:40.974153Z",
                "version": "2.0.3"
              },
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        "providerMetadata": {
          "dateUpdated": "2026-05-11T14:28:49.277Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
      "affected": [
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          "product": "PgBouncer",
          "vendor": "n/a",
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
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      ],
      "configurations": [
        {
          "lang": "en",
          "value": "SCRAM client authentication is configured"
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Thanks to Johannes M\u00f6ller for finding and reporting this problem."
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      "descriptions": [
        {
          "lang": "en",
          "value": "An integer overflow in network packet parsing code in PgBouncer before 1.25.2 bypasses a boundary check and can lead to a crash. An unauthenticated remote attacker can crash PgBouncer with a malformed SCRAM authentication packet."
        }
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      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
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      "problemTypes": [
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              "description": "Integer Overflow or Wraparound",
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        "orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "shortName": "PostgreSQL"
      },
      "references": [
        {
          "url": "https://www.pgbouncer.org/changelog.html#pgbouncer-125x"
        }
      ],
      "title": "PgBouncer integer overflow in PgBouncer network packet parsing",
      "workarounds": [
        {
          "lang": "en",
          "value": "Do not configure SCRAM for client authentication"
        }
      ]
    }
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  "cveMetadata": {
    "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
    "assignerShortName": "PostgreSQL",
    "cveId": "CVE-2026-6664",
    "datePublished": "2026-05-09T00:43:42.640Z",
    "dateReserved": "2026-04-20T12:25:43.095Z",
    "dateUpdated": "2026-05-11T14:28:49.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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