PostgreSQL up to 14.23/15.18/16.14/18.4 amcheck untrusted search path

Summaryinfo

A vulnerability, which was classified as critical, has been found in PostgreSQL up to 14.23/15.18/16.14/18.4. This vulnerability affects the function amcheck. This manipulation causes untrusted search path. This vulnerability is registered as CVE-2026-14673. The attack needs to be launched locally. No exploit is available.

Detailsinfo

A vulnerability has been found in PostgreSQL up to 14.23/15.18/16.14/18.4 and classified as critical. Affected by this vulnerability is the function amcheck. The manipulation with an unknown input leads to a untrusted search path vulnerability. The CWE definition for the vulnerability is CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Untrusted search path in PostgreSQL amcheck allows a grantee of amcheck function EXECUTE privilege to execute arbitrary functions as the owners of expression indexes that depend on the search path, via setting a hostile search path before calling the amcheck function. Within major versions 18, 16, 15, and 14, minor versions before PostgreSQL 18.5, 16.15, 15.19, and 14.24 are affected. PostgreSQL 17 is unaffected.

The advisory is shared at postgresql.org. This vulnerability is known as CVE-2026-14673 since 07/03/2026. The exploitation appears to be difficult. An attack has to be approached locally. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1574 for this issue.

Upgrading to version 14.24, 15.19, 16.15 or 18.5 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
• 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
• 18.0
• 18.1
• 18.2
• 18.3
• 18.4

License

• open-source

Website

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

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