CVE-2023-31136

5.9 mediumEPSS 0.5%

Medium (5.9) in vapor postgresnio. EPSS 0.5% chance of exploitation in the next 30 days.

PostgresNIO is a Swift client for PostgreSQL. Any user of PostgresNIO prior to version 1.14.2 connecting to servers with TLS enabled is vulnerable to a man-in-the-middle attacker injecting false responses to the client's first few queries, despite the use of TLS certificate verification and encryption. The vulnerability is addressed in PostgresNIO versions starting from 1.14.2. There are no known workarounds for unpatched users.

Severity

CVSS 3.1

5.9 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-522
Published: 2023-05-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

vapor:postgresnio

References

https://github.com/advisories/GHSA-467w-rrqc-395f
https://github.com/advisories/GHSA-735f-7qx4-jqq5
https://github.com/apple/swift-nio/pull/2419
https://github.com/vapor/postgres-nio/commit/2df54bc94607f44584ae6ffa74e3cd754fffafc7
https://github.com/vapor/postgres-nio/releases/tag/1.14.2

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