Denial of service in github.com/jackc/pgproto3/v2

The DataRow.Decode function fails to properly validate field lengths. A malicious or compromised PostgreSQL server can send a DataRow message with a negative field length, causing a slice bounds out of range panic.

Problem type

CWE-125: Out-of-bounds Read

Affected products

github.com/jackc/pgproto3/v2

github.com/jackc/pgproto3/v2

< 2.0.0 - UNAFFECTED

References

github.com

https://github.com/jackc/pgx/issues/2507

github.com

https://github.com/golang/vulndb/issues/4518

pkg.go.dev

https://pkg.go.dev/vuln/GO-2026-4518

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-32286

Click to expand

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-32286",
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "dateUpdated": "2026-03-26T19:40:51.974Z",
    "dateReserved": "2026-03-11T16:38:46.556Z",
    "datePublished": "2026-03-26T19:40:51.974Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go",
        "dateUpdated": "2026-03-26T19:40:51.974Z"
      },
      "title": "Denial of service in github.com/jackc/pgproto3/v2",
      "descriptions": [
        {
          "lang": "en",
          "value": "The DataRow.Decode function fails to properly validate field lengths. A malicious or compromised PostgreSQL server can send a DataRow message with a negative field length, causing a slice bounds out of range panic."
        }
      ],
      "affected": [
        {
          "vendor": "github.com/jackc/pgproto3/v2",
          "product": "github.com/jackc/pgproto3/v2",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/jackc/pgproto3/v2",
          "programRoutines": [
            {
              "name": "DataRow.Decode"
            },
            {
              "name": "Frontend.Receive"
            }
          ],
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.0.0"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-125: Out-of-bounds Read"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/jackc/pgx/issues/2507"
        },
        {
          "url": "https://github.com/golang/vulndb/issues/4518"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4518"
        }
      ]
    }
  }
}