FKIE_CVE-2026-18024

Vulnerability from fkie_nvd - Published: 2026-08-13 13:17 - Updated: 2026-08-19 15:00
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Summary
Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.
References
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007https://www.postgresql.org/support/security/CVE-2026-18024/Vendor Advisory
Impacted products
Vendor Product Version
postgresql postgresql *
postgresql postgresql *
postgresql postgresql *
postgresql postgresql *
postgresql postgresql *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "PostgreSQL",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "18.5",
              "status": "affected",
              "version": "18",
              "versionType": "rpm"
            },
            {
              "lessThan": "17.11",
              "status": "affected",
              "version": "17",
              "versionType": "rpm"
            },
            {
              "lessThan": "16.15",
              "status": "affected",
              "version": "16",
              "versionType": "rpm"
            },
            {
              "lessThan": "15.19",
              "status": "affected",
              "version": "15",
              "versionType": "rpm"
            },
            {
              "lessThan": "14.24",
              "status": "affected",
              "version": "0",
              "versionType": "rpm"
            }
          ]
        }
      ],
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6BEE5714-C2EF-48DC-8613-C3EAA149E12E",
              "versionEndExcluding": "14.24",
              "versionStartIncluding": "14.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F433746A-733F-4ED0-9913-8AF69E0C8BF2",
              "versionEndExcluding": "15.19",
              "versionStartIncluding": "15.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1996B91F-E0B2-4A78-8788-E17EA68D179C",
              "versionEndExcluding": "16.15",
              "versionStartIncluding": "16.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3D04E642-71D7-4979-AA19-B9CCDEFD8C31",
              "versionEndExcluding": "17.11",
              "versionStartIncluding": "17.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8494F67B-673A-4E1F-8F40-D24DCC1F8DA4",
              "versionEndExcluding": "18.5",
              "versionStartIncluding": "18.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value.  This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact.  Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected."
    }
  ],
  "id": "CVE-2026-18024",
  "lastModified": "2026-08-19T15:00:39.273",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18024",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-13T13:30:25.733998Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-13T13:17:47.880",
  "references": [
    {
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.postgresql.org/support/security/CVE-2026-18024/"
    }
  ],
  "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-126"
        }
      ],
      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007",
      "type": "Secondary"
    }
  ]
}



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