Privilege escalation via uncleared index-expression search path
Published Aug 13, 2026 · Updated Aug 13, 2026
Untrusted search path in PostgreSQL amcheck before 18.6, 16.15, 15.19, and 14.24 allows remote authenticated users to execute functions. The amcheck sandbox evaluates expression-index functions without first clearing search_path, so SQL- or PL/pgSQL-language functions can resolve attacker-selected objects. Exploitation requires EXECUTE on an amcheck extension function, a hostile search path, and a qualifying expression index; code runs as that index's owner.
Summary
What happened
Untrusted search path in PostgreSQL amcheck before 18.6, 16.15, 15.19, and 14.24 allows remote authenticated users to execute functions. The amcheck sandbox evaluates expression-index functions without first clearing search_path, so SQL- or PL/pgSQL-language functions can resolve attacker-selected objects. Exploitation requires EXECUTE on an amcheck extension function, a hostile search path, and a qualifying expression index; code runs as that index's owner.
The record
- CVE
- CVE-2026-14673
- Published
- Aug 13, 2026
- Updated
- Aug 13, 2026
- Vendor
- PostgreSQL Global Development Group
- Product
- PostgreSQL
- Classifications
- CWE-426, T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- Aug 13, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <14.24
- Affected versionversion=15 <15.19
- Affected versionversion=16 <16.15
- Affected versionversion=18 <18.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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