--- id: CVE-2026-14664 title: >- Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation summary: >- Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation. This shares heritage with CVE-2026-2006, bu… 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-122 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-2026-14664' references: - url: 'https://www.postgresql.org/support/security/CVE-2026-14664/' label: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-14664.json - url: 'https://access.redhat.com/security/cve/CVE-2026-14664' - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2515311' - url: 'https://www.cve.org/CVERecord?id=CVE-2026-14664' - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-14664' - 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' - url: 'https://access.redhat.com/errata/RHSA-2026:71603' tags: - nvd - csaf - vex - red-hat epss: 0.00436 epssPercentile: 0.35222 ingestedAt: '2026-08-29T23:43:52.998Z' --- ## Overview Heap buffer overflow in PostgreSQL regexp allows the query author to execute arbitrary code as the operating system user running the database, via text that would not pass encoding validation. This shares heritage with CVE-2026-2006, but this case involved unanticipated data growth when round-tripped through pg_wchar. 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: Self-service automation portal 2 · no fix planned: Self-service automation portal 2 · updated 2026-09-24 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-14664.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)