{"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"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00526,"epssPercentile":0.43335,"ingestedAt":"2026-08-29T23:43:53.708Z","slug":"CVE-2026-16239","body":"## Overview\n\nType 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.\n\n## Affected\n\n- `postgresql >= 14.0, < 14.24`\n- `postgresql >= 15.0, < 15.19`\n- `postgresql >= 16.0, < 16.15`\n- `postgresql >= 17.0, < 17.11`\n- `postgresql >= 18.0, < 18.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `postgresql 18.5`\n\n## Vendor advisories\n\n- **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)\n- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Self-service automation portal 2 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16239.json)\n- **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)\n- **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)\n- **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)","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}