PostgreSQL psqlODBC prior 18.00.0005 SQLBindParameter heap-based overflow

Summaryinfo

A vulnerability labeled as problematic has been found in PostgreSQL psqlODBC. This impacts the function SQLBindParameter. Such manipulation leads to heap-based overflow. This vulnerability is referenced as CVE-2026-109448. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in PostgreSQL psqlODBC. It has been rated as problematic. Affected by this issue is the function SQLBindParameter. 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 availability. CVE summarizes:

Integer wraparound in psqlODBC SQLBindParameter allows an application, or an attacker who controls how many parameters the application binds on one statement, to corrupt heap memory. psqlODBC stores the binding count in a signed 16-bit field. Binding parameter number 32768 wraps that count to -32768. Binding parameter 32769 then writes about 2.5 MB of zeros starting 1.25 MB before the binding array, which crashes the application or leaves it running on a corrupted heap. Applications that build parameter lists from untrusted input, such as an IN (?, ?, ...) list, are exposed. Versions before psqlODBC 18.00.0005 are affected.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-109448 since 10/12/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 18.00.0005 eliminates this vulnerability.

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Productinfo

Type

• Database Software

Vendor

• PostgreSQL

Name

• psqlODBC

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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