CVE-2026-6666: NULL Pointer Dereference in PgBouncer
A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.
AI Analysis
Technical Summary
This vulnerability involves a null pointer dereference in PgBouncer prior to version 1.25.2. Specifically, if a backend server sends an error response message that does not include the SQLSTATE field, PgBouncer may attempt to dereference a null pointer, causing the process to crash. The issue leads to a denial of service condition but does not affect data confidentiality or integrity. The CVSS 3.1 base score is 5.9, reflecting network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, and high availability impact.
Potential Impact
The primary impact is a denial of service caused by PgBouncer crashing when processing certain malformed error responses from the backend server. There is no impact on confidentiality or integrity of data. No known exploitation in the wild has been reported.
Mitigation Recommendations
No official patch or remediation level has been published yet for this vulnerability. Users should monitor the PgBouncer project for updates and apply the fix once version 1.25.2 or later is released. Until then, consider mitigating by ensuring backend servers do not send error responses missing the SQLSTATE field, if feasible.
CVE-2026-6666: NULL Pointer Dereference in PgBouncer
Description
A possible null pointer reference in PgBouncer before 1.25.2 could lead to a crash, if a server sends an error response without SQLSTATE field.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a null pointer dereference in PgBouncer prior to version 1.25.2. Specifically, if a backend server sends an error response message that does not include the SQLSTATE field, PgBouncer may attempt to dereference a null pointer, causing the process to crash. The issue leads to a denial of service condition but does not affect data confidentiality or integrity. The CVSS 3.1 base score is 5.9, reflecting network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, no confidentiality or integrity impact, and high availability impact.
Potential Impact
The primary impact is a denial of service caused by PgBouncer crashing when processing certain malformed error responses from the backend server. There is no impact on confidentiality or integrity of data. No known exploitation in the wild has been reported.
Mitigation Recommendations
No official patch or remediation level has been published yet for this vulnerability. Users should monitor the PgBouncer project for updates and apply the fix once version 1.25.2 or later is released. Until then, consider mitigating by ensuring backend servers do not send error responses missing the SQLSTATE field, if feasible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-04-20T12:25:44.609Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fe8c5ccbff5d86108b6aaf
Added to database: 5/9/2026, 1:22:36 AM
Last enriched: 5/9/2026, 1:36:46 AM
Last updated: 5/9/2026, 2:45:46 AM
Views: 3
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