GHSA-hq9p-pm7w-8p54
pgjdbc Client Allows Fallback to Insecure Authentication Despite channelBinding=require Configuration
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | org.postgresql:postgresql | >= 42.7.4, < 42.7.7 | 42.7.7 |
Details
As written in the advisory (Markdown source, shown as plain text).
### Impact
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.
### Patches
TBD
### Workarounds
Configure `sslMode=verify-full` to prevent MITM attacks.
### References
* https://www.postgresql.org/docs/current/sasl-authentication.html#SASL-SCRAM-SHA-256
* https://datatracker.ietf.org/doc/html/rfc7677
* https://datatracker.ietf.org/doc/html/rfc5802
References
External links from the advisory. They lead to third-party sites.
- https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-hq9p-pm7w-8p54
- https://nvd.nist.gov/vuln/detail/CVE-2025-49146
- https://github.com/pgjdbc/pgjdbc/commit/9217ed16cb2918ab1b6b9258ae97e6ede244d8a0
- https://datatracker.ietf.org/doc/html/rfc5802
- https://datatracker.ietf.org/doc/html/rfc7677
- https://github.com/pgjdbc/pgjdbc
- https://www.postgresql.org/docs/current/sasl-authentication.html#SASL-SCRAM-SHA-256