User impersonation via NUL-truncated certificate common name
Published Sep 30, 2026 · Updated Sep 30, 2026
Improper certificate validation in Pgpool-II 4.0 through 4.7.2 allows remote attackers to assume another database user via a crafted client certificate. Client certificate authentication compares the certificate common name with the requested username but treats an embedded NUL byte as a valid match despite a different complete name. Exploitation requires an SSL connection using certificate authentication and a valid client certificate; the bypass removes the need for the impersonated user's password.
Summary
What happened
Improper certificate validation in Pgpool-II 4.0 through 4.7.2 allows remote attackers to assume another database user via a crafted client certificate. Client certificate authentication compares the certificate common name with the requested username but treats an embedded NUL byte as a valid match despite a different complete name. Exploitation requires an SSL connection using certificate authentication and a valid client certificate; the bypass removes the need for the impersonated user's password.
The record
- CVE
- CVE-2026-92868
- Published
- Sep 30, 2026
- Updated
- Sep 30, 2026
- Vendor
- Pgpool Global Development Group
- Product
- Pgpool-II
- Classifications
- CWE-295, T1649
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 30, 2026CVE publishedPublication date reported by the CVE source.
- Sep 30, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=4.0.x <=4.2.x
- Affected versionversion=4.3.0 <=4.3.20
- Affected versionversion=4.4.0 <=4.4.17
- Affected versionversion=4.5.0 <=4.5.12
- Affected versionversion=4.6.0 <=4.6.7
- Affected versionversion=4.7.0 <=4.7.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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