pgjdbc does not enforce requireAuth when the value excludes every authentication method
Summary
| CVE | CVE-2026-107314 |
|---|---|
| State | PUBLISHED |
| Assigner | PostgreSQL |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-07 23:17:00 UTC |
| Updated | 2026-10-07 23:17:00 UTC |
| Description | pgjdbc, the PostgreSQL JDBC Driver, versions 42.7.11 through 42.7.13 enforce no restriction when the requireAuth connection property excludes all six authentication methods the driver knows, for example requireAuth=!password,!md5,!gss,!sspi,!scram-sha-256,!none. The driver then accepts any method the server asks for, including cleartext password authentication. A value without a method in it, such as requireAuth=, (a single comma), is affected the same way. An attacker positioned between the application and its server can ask for cleartext password authentication and receive the database password. A positive list such as requireAuth=scram-sha-256, and a partial exclusion such as requireAuth=!password,!md5, are enforced correctly. The property has no default value, so a deployment that does not set it is not affected. 42.7.14 fixes the problem: such a connection is refused with SQLState 08004, and a value without a method in it is rejected as invalid. |
Risk And Classification
Primary CVSS: v3.1 5.9 MEDIUM from f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Problem Types: CWE-636 | CWE-636 CWE-636 Not Failing Securely ('Failing Open')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 | Secondary | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| 3.1 | CNA | DECLARED | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/pgjdbc/pgjdbc/security/advisories/GHSA-rhp9-mr79-r74h | f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Daniel Coles (en)
Additional Advisory Data
Solutions
CNA: Upgrade to pgjdbc 42.7.14 or later, and replace a requireAuth value that excludes every method or names none with a positive list of the methods the server uses.
Workarounds
CNA: Replace the requireAuth value with a positive list of the methods the server uses, for example requireAuth=scram-sha-256; a positive list is enforced correctly on every affected version. A deployment that uses SCRAM over TLS can also set channelBinding=require, which refuses every authentication request other than SCRAM. Verifying the server certificate with sslmode=verify-full against a trusted CA prevents an attacker from presenting a substitute server.