Integer overflow in PostgreSQL Psqlodbc
CVE-2026-109448
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-109448?
- CVE-2026-109448 is a medium-severity vulnerability in PostgreSQL Psqlodbc, classified under Buffer Underwrite. CVSS score: 5.9/10. Published 2026-10-12.
- How severe is CVE-2026-109448?
- Medium severity. CVSS v3 base score is 5.9 out of 10.