PostgreSQL up to 18.4 plperl heap-based overflow

Summaryinfo

A vulnerability was found in PostgreSQL up to 14.23/15.18/16.14/17.10/18.4. It has been rated as problematic. The affected element is an unknown function of the component plperl. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-14670. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in PostgreSQL up to 14.23/15.18/16.14/17.10/18.4 and classified as problematic. This issue affects an unknown function of the component plperl. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Heap buffer overflow in PostgreSQL plperl return of a tied hash allows the function owner to execute arbitrary code as the operating system user running the database, via a crafted function body. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

The advisory is shared at postgresql.org. The identification of this vulnerability is CVE-2026-14670 since 07/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 14.24, 15.19, 16.15, 17.11 or 18.5 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
• 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
• 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
• 17.0
• 17.1
• 17.2
• 17.3
• 17.4
• 17.5
• 17.6
• 17.7
• 17.8
• 17.9
• 17.10
• 18.0
• 18.1
• 18.2
• 18.3
• 18.4

License

• open-source

Website

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

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Entryinfo

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

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