Medium [CVE-2026-14666] Row security caching disregards role modifications leading to unauthorized data access
This medium-severity Red Hat Linux advisory covers CVE-2026-14666 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
Row security caching disregards role modifications leading to unauthorized data access. Red Hat rates this moderate (CVSS 4.2).
Weakness: CWE-524.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Self-service automation portal 2; and 2 more.
Affected products named by the advisory: Red Hat package: postgresql16; Red Hat package: postgresql18.
- < 18.5
- < 17.11
- < 16.15
- < 15.19
- < 14.24
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To mitigate this issue, ensure that all active PostgreSQL sessions are terminated or restarted after any changes to role membership, role attributes, or database ownership that affect row-level security policies. This action forces the invalidation of stale cached security policies, preventing unauthorized data access. Note that terminating sessions will disrupt active user connections.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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