PostgreSQL psqlODBC up to 18.00.0005 heap-based overflow

Summaryinfo

A vulnerability categorized as critical has been discovered in PostgreSQL psqlODBC up to 18.00.0005. Impacted is an unknown function. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-120058. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PostgreSQL psqlODBC up to 18.00.0005 and classified as critical. Affected by this issue is an unknown functionality. 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. CVE summarizes:

psqlODBC sizes its row cache from the column count of a cursor's first result, but recomputes the column count from each later FETCH reply without checking that it matches. A server not trusted under current SSL settings can answer a later FETCH with more columns and make the driver write tuple records past the end of the heap allocation. A keyset reply with fewer columns than the key fields also underflows the unsigned field count. This is reachable with UseDeclareFetch enabled. Versions before psqlODBC 18.00.0006 are affected.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-120058 since 10/30/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 18.00.0006 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Database Software

Vendor

• PostgreSQL

Name

• psqlODBC

Version

• 18.00.0005

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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