CVE-2026-107315

pgjdbc, the PostgreSQL JDBC Driver, versions 42.7.4 through 42.7.13 pads a value that is shorter than its declared length with bytes left in its send buffer instead of zeros, and the server stores those bytes as part of the value. The bytes are messages the driver sent earlier on the same connection: SQL text and parameter values of recent statements, which on a pooled connection can come from other requests. Each padded value can carry up to 8192 bytes of this traffic, or 16320 bytes on a connection with GSS encryption. The padding happens when an application declares a length larger than the data it supplies, through PreparedStatement.setObject with a ByteStreamWriter, CopyIn.writeToCopy, PGCopyOutputStream.write, LargeObject.write, or Blob.setBytes. The driver accepts these calls without an error. An attacker who can make the application store such a value and read it back can collect earlier traffic. Applications whose declared lengths always match their data are not affected. Versions 42.7.3 and earlier pad with zeros.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-f64h-wr5q-3qf3
https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-f64h-wr5q-3qf3

Configurations

No configuration.

History

08 Oct 2026, 15:17

Type	Values Removed	Values Added
References	~~() https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-f64h-wr5q-3qf3 -~~	() https://github.com/pgjdbc/pgjdbc/security/advisories/GHSA-f64h-wr5q-3qf3 -

08 Oct 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-08 00:16

Updated : 2026-10-08 20:49

NVD link : CVE-2026-107315

Mitre link : CVE-2026-107315

CVE.ORG link : CVE-2026-107315

JSON object : View

Products Affected

No product.

CWE

CWE-201

Insertion of Sensitive Information Into Sent Data

CWE-226

Sensitive Information in Resource Not Removed Before Reuse

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