PostgreSQL up to 18.6 plpgsql type confusion

Summaryinfo

A vulnerability labeled as critical has been found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6. The affected element is the function plpgsql. Such manipulation leads to type confusion. This vulnerability is documented as CVE-2026-120151. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in PostgreSQL up to 14.24/15.19/16.15/17.11/18.6. Affected by this issue is the function plpgsql. 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. CVE summarizes:

Type confusion in PostgreSQL plpgsql record-field assignment allows an object creator to execute arbitrary code as the operating system user running the database, via a reentrant domain CHECK that changes a RECORD variable's row type while a value is being cast. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

The advisory is shared for download at postgresql.org. This vulnerability is handled as CVE-2026-120151 since 10/30/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available.

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

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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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