CVE-2026-14666
PostgreSQL row security caching disregards role modifications
Description
Incomplete tracking in PostgreSQL of changes to role membership, role attributes, and database ownership allows a query to continue using cached row-level security policies after those changes require a different policy, via plan reuse. Stale policies continue until some other event invalidates the cache or connection termination ends the session. This permits a user to complete reads and modifications that were recently permitted but now forbidden. An attacker must tailor an attack to a particular application's pattern of privilege removal and role-specific row security policies. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
INFO
Published Date :
Aug. 13, 2026, 1:17 p.m.
Last Modified :
Aug. 29, 2026, 11:17 p.m.
Remotely Exploit :
No
Source :
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 |
Solution
- Update PostgreSQL to a fixed version.
- Restart PostgreSQL services after updating.
- Monitor role and policy changes closely.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-14666.
| URL | Resource |
|---|---|
| https://www.postgresql.org/support/security/CVE-2026-14666/ | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-14666 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-14666
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-14666 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-14666 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Aug. 29, 2026
Action Type Old Value New Value Changed Description Incomplete tracking in PostgreSQL of changes to role membership, role attributes, and database ownership allows a query to continue using cached row-level security policies after those changes require a different policy, via plan reuse. Stale policies continue until some other event invalidates the cache or connection termination ends the session. This permits a user to complete reads and modifications that were recently permitted but now forbidden. An attacker must tailor an attack to a particular application's pattern of privilege removal and role-specific row security policies. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. Incomplete tracking in PostgreSQL of changes to role membership, role attributes, and database ownership allows a query to continue using cached row-level security policies after those changes require a different policy, via plan reuse. Stale policies continue until some other event invalidates the cache or connection termination ends the session. This permits a user to complete reads and modifications that were recently permitted but now forbidden. An attacker must tailor an attack to a particular application's pattern of privilege removal and role-specific row security policies. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected. Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/14xxx/CVE-2026-14666.json">CVE-2026-14666</a> Added Reference https://www.postgresql.org/support/security/CVE-2026-14666/ Removed Reference https://www.postgresql.org/support/security/CVE-2026-14666/ Removed Reference Type https://www.postgresql.org/support/security/CVE-2026-14666/ Types: Vendor Advisory -
Initial Analysis by [email protected]
Aug. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* versions from (including) 14.0 up to (excluding) 14.24 *cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* versions from (including) 15.0 up to (excluding) 15.19 *cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* versions from (including) 16.0 up to (excluding) 16.15 *cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* versions from (including) 17.0 up to (excluding) 17.11 *cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* versions from (including) 18.0 up to (excluding) 18.5 Added Reference Type PostgreSQL: https://www.postgresql.org/support/security/CVE-2026-14666/ Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 13, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-14666', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-13T14:53:54.547151Z'} -
New CVE Received by f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'PostgreSQL', 'versions': [{'status': 'affected', 'version': '18', 'lessThan': '18.5', 'versionType': 'rpm'}, {'status': 'affected', 'version': '17', 'lessThan': '17.11', 'versionType': 'rpm'}, {'status': 'affected', 'version': '16', 'lessThan': '16.15', 'versionType': 'rpm'}, {'status': 'affected', 'version': '15', 'lessThan': '15.19', 'versionType': 'rpm'}, {'status': 'affected', 'version': '0', 'lessThan': '14.24', 'versionType': 'rpm'}], 'defaultStatus': 'unaffected'}] Added Description Incomplete tracking in PostgreSQL of changes to role membership, role attributes, and database ownership allows a query to continue using cached row-level security policies after those changes require a different policy, via plan reuse. Stale policies continue until some other event invalidates the cache or connection termination ends the session. This permits a user to complete reads and modifications that were recently permitted but now forbidden. An attacker must tailor an attack to a particular application's pattern of privilege removal and role-specific row security policies. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected. Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N Added CWE CWE-1250 Added Reference https://www.postgresql.org/support/security/CVE-2026-14666/