CVE-2026-120154
Description
A flaw was found in PostgreSQL. An authenticated database user with table modification privileges can bypass Row-Level Security (RLS) policies, leading to unauthorized information disclosure. By executing iterated INSERT ... ON CONFLICT DO UPDATE statements, an attacker can read protected rows that should otherwise be restricted by security policies.
Statement
This vulnerability is rated as Moderate because exploitation requires an authenticated database user who already possesses substantial table-level rights (such as INSERT, UPDATE, and SELECT) alongside tables with active Row-Level Security. In standard Red Hat environments, Row-Level Security policies are disabled by default and require explicit administrative activation per table. Additionally, the flaw is restricted to unintended row retrieval, preventing unauthorized data modification or host compromise.
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 | 4.3 | N/A | 4.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| 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:L/PR:L/UI:N/S:U/C:L/I:N/A:N
cve.org: CVSS:3.1/AV:N/AC:L/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
A user can be given or gain access rights of another user. This can give the user unauthorized access to sensitive information including the access information of another user.
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