CVE-2026-50735

{
  "id": "CVE-2026-50735",
  "sourceIdentifier": "20be33e2-bf35-4d13-8fad-18bd2f3e3659",
  "published": "2026-07-28T19:17:36.540",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "pglogical's apply worker does not sufficiently validate the length of certain fields in incoming replication protocol messages before copying them, resulting in an out-of-bounds read. A party acting as the publisher for a subscription, for example a non-PostgreSQL endpoint that speaks the pglogical replication protocol, can return crafted messages that cause the subscriber's apply worker to read beyond the bounds of an allocated buffer, disclosing adjacent process memory or crashing the worker. To exploit the issue an attacker must be able to direct a subscription at an endpoint they control. In default installations this requires privileges normally reserved for a superuser, so the issue is most relevant to managed deployments where the ability to create subscriptions has been delegated to non-superuser roles."
    },
    {
      "lang": "es",
      "value": "El worker de aplicación de pglogical no valida suficientemente la longitud de ciertos campos en los mensajes entrantes del protocolo de replicación antes de copiarlos, lo que resulta en una lectura fuera de límites. Una parte que actúa como publicador para una suscripción, por ejemplo, un endpoint que no es PostgreSQL y que habla el protocolo de replicación pglogical, puede devolver mensajes manipulados que hacen que el worker de aplicación del suscriptor lea más allá de los límites de un búfer asignado, revelando memoria de proceso adyacente o bloqueando el worker. Para explotar el problema, un atacante debe ser capaz de dirigir una suscripción a un endpoint que controlan. En instalaciones predeterminadas, esto requiere privilegios normalmente reservados para un superusuario, por lo que el problema es más relevante para implementaciones gestionadas donde la capacidad de crear suscripciones ha sido delegada a roles que no son de superusuario."
    }
  ],
  "affected": [
    {
      "source": "20be33e2-bf35-4d13-8fad-18bd2f3e3659",
      "affectedData": [
        {
          "vendor": "EnterpriseDB",
          "product": "pglogical",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2",
              "lessThan": "2.4.8",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "20be33e2-bf35-4d13-8fad-18bd2f3e3659",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/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",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
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          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-28T18:58:57.167071Z",
          "id": "CVE-2026-50735",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "20be33e2-bf35-4d13-8fad-18bd2f3e3659",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:enterprisedb:pglogical:*:*:*:*:*:postgresql:*:*",
              "versionStartIncluding": "2.0.0",
              "versionEndExcluding": "2.4.8",
              "matchCriteriaId": "DC0E75E2-2571-4AB8-892A-DA7B88B722EF"
            }
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  ],
  "references": [
    {
      "url": "https://www.enterprisedb.com/docs/security/advisories/cve202650735/",
      "source": "20be33e2-bf35-4d13-8fad-18bd2f3e3659",
      "tags": [
        "Vendor Advisory"
      ]
    }
  ]
}