CVE-2026-107315 pgjdbc CVE debrief

Who should care

Defenders responsible for applications using pgjdbc, especially those using versions 42.7.4 through 42.7.13, should assess their exposure. This includes developers, security teams, and system administrators who manage applications interacting with PostgreSQL databases using pgjdbc.

Why it matters

The pgjdbc vulnerability allows an attacker to collect earlier traffic by storing and reading padded values. Defenders should verify application usage of affected versions and certain methods, and prioritize remediation.

• An attacker can collect earlier traffic, potentially including sensitive SQL text and parameter values.
• Defenders need to verify if their applications are using affected versions of pgjdbc.
• Usage patterns of certain methods like PreparedStatement.setObject could lead to exposure.
• Remediation priority is to update to a non-affected version and review application usage of pgjdbc methods.

Technical summary

The pgjdbc vulnerability occurs when the driver pads values shorter than their declared length with bytes from earlier statements instead of zeros. This can happen through methods like PreparedStatement.setObject or LargeObject.write. An attacker who can store and read such values can collect earlier traffic, potentially including SQL text and parameter values. To mitigate, defenders should prioritize verifying if their applications use affected versions of pgjdbc and assess if their usage patterns could lead to exposure. They should also review their applications' use of PreparedStatement.setObject, CopyIn.writeToCopy, PGCopyOutputStream.write, LargeObject.write, or Blob.setBytes to ensure declared lengths

Defensive priority

Defenders should prioritize verifying if their applications use affected versions of pgjdbc and assess if their usage patterns could lead to exposure. They should also review their applications' use of PreparedStatement.setObject, CopyIn.writeToCopy, PGCopyOutputStream.write, LargeObject.write, or Blob.setBytes to ensure declared lengths match the data supplied.

Recommended defensive actions

• Verify if applications use affected pgjdbc versions (42.7.4 through 42.7.13) and assess usage patterns.
• Review applications' use of PreparedStatement.setObject, CopyIn.writeToCopy, PGCopyOutputStream.write, LargeObject.write, or Blob.setBytes.
• Ensure declared lengths match data supplied in these methods.
• Monitor for and analyze traffic that could be collected by an attacker.
• Perform vulnerability scanning to identify potentially exposed systems.
• Implement compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details about the vulnerability in pgjdbc. The CVE Program and NVD offer official records and assessments. A vendor advisory is available on GitHub. To verify, defenders should check the official CVE record and vendor advisory for affected versions and usage patterns. They should also review their applications' use of PreparedStatement.setObject, CopyIn.writeToCopy, PGCopyOutputStream.write, LargeObject.write, or Blob.setBytes to ensure declared lengths match the data supplied. Evidence is based

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.