CVE-2026-16239

Status: ModifiedHigh (8.8)—

Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base score: 8.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.68%
Percentile among all scored CVEs: 51
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement85 %
Primary impactT1059 Command and Scripting Interpreterexecution90 %
Secondary impactT1068 Exploitation for Privilege Escalationprivilege escalation80 %

Vector CVSS AV:N/AC:L/PR:L/UI:N indica acceso remoto con privilegios locales (PR:L). Type confusion permite ejecución arbitraria de código como usuario del SO. PostgreSQL es servicio remoto; con privilegios previos se explota para ejecutar comandos (T1059) y escalar a nivel de SO (T1068).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence Program Privileged Account Management Execution Prevention Disable or Remove Feature or Program Application Isolation and Sandboxing Exploit Protection

Affected technologies (1)

Postgresql — Postgresql

CWEs

CWE-843

References

https://www.postgresql.org/support/security/CVE-2026-16239/

Raw JSON (NVD)

Show

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