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CVE-2026-6638

Estado: AnalizadaAlta (8.8)—

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

SQL injection (CWE-89) en servicio remoto PostgreSQL con PR:L permite ejecución arbitraria de SQL con credenciales de la publicación, logrando ejecución de comandos y acceso a datos.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementDisable or Remove Feature or ProgramVulnerability ScanningThreat Intelligence ProgramRestrict Web-Based ContentRestrict File and Directory Permissions

Tecnologías afectadas (1)

Postgresql — Postgresql

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-6638",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-14T15:28:21.916462Z"
        }
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  "published": "2026-05-14T14:16:25.937",
  "references": [
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      "url": "https://www.postgresql.org/support/security/CVE-2026-6638/",
      "tags": [
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        "Vendor Advisory"
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      "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"
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      "lang": "en",
      "value": "SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials.  The attack takes effect at the next REFRESH PUBLICATION.  Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected.  Versions before PostgreSQL 16 are unaffected."
    }
  ],
  "lastModified": "2026-06-17T11:01:08.453",
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