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CVE-2026-61818

8.5 · HIGH

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID.

Published Sep 18, 2026CWE-89EPSS 0.51%

Overview

CVE-2026-61818 is a high-severity vulnerability. It was published on September 18, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

pg_partman is a PostgreSQL extension that manages partitioned tables by time or ID. Prior to 5.5.0, undo_partition() reads part_config.time_encoder as unrestricted text and interpolates it without identifier quoting into a dynamically executed SELECT statement. A role with partman_user access can store SQL rather than a function name, and the SQL executes with the privileges of the caller that invokes undo_partition(). The function is not part of the default background-worker path, which limits the automatic superuser escalation described by the related create-partition vulnerability, but a privileged caller can still have its available confidentiality, integrity, and availability permissions abused. This issue is fixed in version 5.5.0.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/pgpartman/pg_partman/commit/ba9405542acf24dd881845b935cab8b165854361GitHubgithub.com/pgpartman/pg_partman/releases/tag/v5.5.0GitHubgithub.com/pgpartman/pg_partman/security/advisories/GHSA-fm3m-9fh7-mqfc

How CyberStrike helps

Frequently asked questions

What is CVE-2026-61818?

CVE-2026-61818 is a high-severity vulnerability. It was published on September 18, 2026 and has a CVSS 3.1 base score of 8.5 (HIGH).

How severe is CVE-2026-61818?

This vulnerability has a CVSS 3.1 base score of 8.5, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-61818?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-61818?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-61818 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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