PostgreSQL up to 18.6 Aggregate Optimization type confusion

Summaryinfo

A vulnerability identified as critical has been detected in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6. This affects an unknown part of the component Aggregate Optimization. The manipulation leads to type confusion. This vulnerability is documented as CVE-2026-116331. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6 and classified as critical. This issue affects some unknown functionality of the component Aggregate Optimization. The manipulation with an unknown input leads to a type confusion vulnerability. Using CWE to declare the problem leads to CWE-843. The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Type confusion in PostgreSQL min/max aggregate optimization allows an object creator to execute arbitrary code as the operating system user running the database, via a user-defined aggregate whose SORTOP option causes the planner to treat the aggregate's input and result as the same type when they differ. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

The advisory is shared at postgresql.org. The identification of this vulnerability is CVE-2026-116331 since 10/26/2026. The exploitation is known to be easy. The attack may be initiated remotely. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

Upgrading to version 14.25, 15.20, 16.16, 17.12 or 18.7 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Database Software

Name

• PostgreSQL

Version

• 14.0
• 14.1
• 14.2
• 14.3
• 14.4
• 14.5
• 14.6
• 14.7
• 14.8
• 14.9
• 14.10
• 14.11
• 14.12
• 14.13
• 14.14
• 14.15
• 14.16
• 14.17
• 14.18
• 14.19
• 14.20
• 14.21
• 14.22
• 14.23
• 14.24
• 15.0
• 15.1
• 15.2
• 15.3
• 15.4
• 15.5
• 15.6
• 15.7
• 15.8
• 15.9
• 15.10
• 15.11
• 15.12
• 15.13
• 15.14
• 15.15
• 15.16
• 15.17
• 15.18
• 15.19
• 16.0
• 16.1
• 16.2
• 16.3
• 16.4
• 16.5
• 16.6
• 16.7
• 16.8
• 16.9
• 16.10
• 16.11
• 16.12
• 16.13
• 16.14
• 16.15
• 17.0
• 17.1
• 17.2
• 17.3
• 17.4
• 17.5
• 17.6
• 17.7
• 17.8
• 17.9
• 17.10
• 17.11
• 18.0
• 18.1
• 18.2
• 18.3
• 18.4
• 18.5
• 18.6

License

• open-source

Website

• Product: https://www.postgresql.org/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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