CVE-2026-120057

{
  "id": "CVE-2026-120057",
  "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
  "published": "2026-11-02T19:18:02.700",
  "lastModified": "2026-11-02T20:17:38.787",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "psqlODBC copies the reply to a large-object read (loread) into the application's buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected."
    }
  ],
  "affected": [
    {
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
      "affectedData": [
        {
          "vendor": "PostgreSQL",
          "product": "psqlODBC",
          "defaultStatus": "unaffected",
          "programFiles": [
            "connection.c",
            "lobj.c",
            "convert.c"
          ],
          "programRoutines": [
            {
              "name": "CC_send_function"
            },
            {
              "name": "odbc_lo_read"
            },
            {
              "name": "convert_lo"
            }
          ],
          "repo": "https://github.com/postgresql-interfaces/psqlodbc",
          "versions": [
            {
              "version": "0",
              "lessThan": "18.00.0006",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-11-02T19:17:40.542954Z",
          "id": "CVE-2026-120057",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r",
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"
    }
  ]
}