CVE-2026-116303
Description
A flaw was found in PostgreSQL. An authenticated database user can bypass permission checks to invoke restricted type conversion (cast) functions without the necessary execution privileges. By triggering operations such as foreign key evaluations or data formatting functions, a user may execute unauthorized functions and potentially access sensitive information.
Statement
This vulnerability is rated as having a Low impact because exploitation requires an authenticated database user and depends on the presence of custom cast functions that both restrict execute permissions and expose sensitive data. In standard Red Hat Enterprise Linux PostgreSQL deployments, cast functions are not configured with restrictive execute permissions nor do they handle confidential logic by default. Consequently, typical production environments have virtually no practical exposure to this flaw.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 3.1 | N/A | 3.1 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | High | N/A | High |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | Low | N/A | Low |
| Integrity Impact | None | N/A | None |
| Availability Impact | None | N/A | None |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Understanding the Weakness (CWE)
Access Control
Technical Impact: Gain Privileges or Assume Identity; Bypass Protection Mechanism
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