Integer Underflow (Wrap or Wraparound) Affecting libpq package, versions [14.2,17.11)
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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Test your applications- Snyk IDSNYK-CONAN-LIBPQ-19427838
- published29 Aug 2026
- disclosed13 Aug 2026
- creditUnknown
Introduced: 13 Aug 2026
NewCVE-2026-16241 (opens in a new tab)How to fix?
Upgrade libpq to version 17.11 or higher.
Overview
Affected versions of this package are vulnerable to Integer Underflow (Wrap or Wraparound) via the ECPG process. An attacker can cause the client to overwrite a large memory region with uncontrolled bytes by sending a specially crafted bytea value lacking the required prefix. This can result in a client crash or, in rare cases, impact client-specific data integrity.