--- id: CVE-2026-16239 title: >- 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 summary: >- 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 PostgreS… severity: high cvss: 8.8 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-843 vendor: postgresql product: postgresql affected: - 'postgresql >= 14.0, < 14.24' - 'postgresql >= 15.0, < 15.19' - 'postgresql >= 16.0, < 16.15' - 'postgresql >= 17.0, < 17.11' - 'postgresql >= 18.0, < 18.5' patched: - postgresql 18.5 published: '2026-08-13' updated: '2026-08-29' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16239' references: - url: 'https://www.postgresql.org/support/security/CVE-2026-16239/' label: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16239.json - url: 'https://access.redhat.com/security/cve/CVE-2026-16239' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2515316' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-16239' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-16239' - url: 'https://access.redhat.com/errata/RHSA-2026:67280' - url: 'https://access.redhat.com/errata/RHSA-2026:67491' - url: 'https://access.redhat.com/errata/RHSA-2026:67848' - url: 'https://access.redhat.com/errata/RHSA-2026:69698' - url: 'https://access.redhat.com/errata/RHSA-2026:70186' - url: 'https://access.redhat.com/errata/RHSA-2026:69923' - url: 'https://access.redhat.com/errata/RHSA-2026:69876' - url: 'https://access.redhat.com/errata/RHSA-2026:69914' - url: 'https://access.redhat.com/errata/RHSA-2026:69607' - url: 'https://access.redhat.com/errata/RHSA-2026:69924' - url: 'https://access.redhat.com/errata/RHSA-2026:70602' - url: 'https://access.redhat.com/errata/RHSA-2026:70763' - url: 'https://access.redhat.com/errata/RHSA-2026:70762' - url: 'https://access.redhat.com/errata/RHSA-2026:70856' - url: 'https://access.redhat.com/errata/RHSA-2026:70559' tags: - nvd - csaf - vex - red-hat epss: 0.00526 epssPercentile: 0.43545 ingestedAt: '2026-08-29T23:43:53.708Z' --- ## Overview 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. ## Affected - `postgresql >= 14.0, < 14.24` - `postgresql >= 15.0, < 15.19` - `postgresql >= 16.0, < 16.15` - `postgresql >= 17.0, < 17.11` - `postgresql >= 18.0, < 18.5` ## Remediation Upgrade past the affected range: - `postgresql 18.5` ## Vendor advisories - **RHSA-2026:67280** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67280) - **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Self-service automation portal 2 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Self-service automation portal 2 · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16239.json) - **RHSA-2026:67491** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-15 · [advisory](https://access.redhat.com/errata/RHSA-2026:67491) - **RHSA-2026:67848** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:67848) - **RHSA-2026:69698** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69698) - **RHSA-2026:70186** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70186) - **RHSA-2026:69923** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:69923) - **RHSA-2026:69876** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:69876) - **RHSA-2026:69914** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:69914) - **RHSA-2026:69607** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:69607) - **RHSA-2026:69924** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:69924) - **RHSA-2026:70602** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70602) - **RHSA-2026:70763** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70763) - **RHSA-2026:70762** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70762) - **RHSA-2026:70856** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70856) - **RHSA-2026:70559** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70559)