FKIE_CVE-2026-55769

Vulnerability from fkie_nvd - Published: 2026-08-20 22:17 - Updated: 2026-08-21 12:16
Severity
9.4 (Critical) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Summary
CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.28.4 and 1.29.2, CloudNativePG opened superuser connections without pinning search_path in fillDefaultParameters in pkg/management/postgres/pool/profiles.go. A role holding DATABASE OWNER could create overloaded built-in operators in the public schema and change the database or role search_path, causing instance-manager introspection queries such as SELECT COUNT(*) > 0 FROM pg_catalog.pg_extension WHERE extname = $1 to execute attacker-controlled functions as the postgres superuser. The same trust issue affected direct sql.Open("pgx", ...) callsites and the public.user_search SECURITY DEFINER function, enabling PostgreSQL superuser access, operating system command execution through COPY ... FROM PROGRAM, and access to the pod ServiceAccount token. This issue is fixed in versions 1.28.4, 1.29.2, and 1.30.0.
References
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/commit/02b5c6289b7609dc87fcb1ae9c113160e3d43308
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/commit/db38f4d80315c8f1b21bf511ef0f28871820c14d
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/commit/e0e2d53adbd907a61f583b1431904b5969f3fd22
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/pull/10774
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.4
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.2
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.30.0
security-advisories@github.comhttps://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3p4r-v9r6
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3p4r-v9r6
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "cloudnative-pg",
          "vendor": "cloudnative-pg",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.28.4"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.29.0, \u003c 1.29.2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CloudNativePG is a platform designed to manage PostgreSQL databases within Kubernetes environments. Prior to 1.28.4 and 1.29.2, CloudNativePG opened superuser connections without pinning search_path in fillDefaultParameters in pkg/management/postgres/pool/profiles.go. A role holding DATABASE OWNER could create overloaded built-in operators in the public schema and change the database or role search_path, causing instance-manager introspection queries such as SELECT COUNT(*) \u003e 0 FROM pg_catalog.pg_extension WHERE extname = $1 to execute attacker-controlled functions as the postgres superuser. The same trust issue affected direct sql.Open(\"pgx\", ...) callsites and the public.user_search SECURITY DEFINER function, enabling PostgreSQL superuser access, operating system command execution through COPY ... FROM PROGRAM, and access to the pod ServiceAccount token. This issue is fixed in versions 1.28.4, 1.29.2, and 1.30.0."
    }
  ],
  "id": "CVE-2026-55769",
  "lastModified": "2026-08-21T12:16:29.243",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.4,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55769",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T11:20:03.067773Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-20T22:17:22.640",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/commit/02b5c6289b7609dc87fcb1ae9c113160e3d43308"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/commit/db38f4d80315c8f1b21bf511ef0f28871820c14d"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/commit/e0e2d53adbd907a61f583b1431904b5969f3fd22"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/pull/10774"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.28.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.29.2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/releases/tag/v1.30.0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3p4r-v9r6"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/cloudnative-pg/cloudnative-pg/security/advisories/GHSA-x8c2-3p4r-v9r6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-426"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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