Stack-based Buffer Overflow Affecting postgresql package, versions [14.0,14.23)[15.0,15.18)[16.0,16.14)[17.0,17.10)[18.0,18.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published14 May 2026
- disclosed14 May 2026
- creditNikolay Samokhvalov
Introduced: 14 May 2026
CVE-2026-6637 (opens in a new tab)How to fix?
Upgrade postgresql to version 14.23, 15.18, 16.14, 17.10, 18.4 or higher.
Overview
Affected versions of this package are vulnerable to Stack-based Buffer Overflow via the refint process. An attacker can execute arbitrary code as the operating system user running the database or execute arbitrary SQL as the database user performing a primary key update by providing crafted input to a user-controlled column declared as a cascade primary key and facilitating user-controlled updates to that column. This is only exploitable if the application declares a user-controlled column as a cascade primary key using refint and allows user-controlled updates to that column.