EUVD-2026-57839
GHSA-qp83-ppf3-v924
Severity by source
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
PR:H reflects the mandatory explicit EXECUTE grant on amcheck; impact capped at L/L/N as escalation stays within the database trust boundary.
Primary rating from Vendor (f86ef6dc-4d3a-42ad-8f28-e6d5547a5007).
CVSS VectorVendor: f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
Lifecycle Timeline
3DescriptionCVE.org
Untrusted search path in PostgreSQL amcheck allows a grantee of amcheck function EXECUTE privilege to execute arbitrary functions as the owners of expression indexes that depend on the search path, via setting a hostile search path before calling the amcheck function. Within major versions 18, 16, 15, and 14, minor versions before PostgreSQL 18.5, 16.15, 15.19, and 14.24 are affected. PostgreSQL 17 is unaffected.
AnalysisAI
Untrusted search path in PostgreSQL's amcheck extension allows a database user holding EXECUTE privilege on amcheck functions to execute arbitrary functions as the owners of expression indexes by injecting a hostile search_path before calling amcheck. Affected are PostgreSQL major versions 14, 15, 16, and 18 in releases prior to 14.24, 15.19, 16.15, and 18.5 respectively; version 17 is entirely unaffected. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the attacking database account has been explicitly granted EXECUTE privilege on one or more amcheck functions (e.g., bt_index_check) - this is a non-default configuration that a superuser or function owner must deliberately configure. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 3.1 score of 3.8 (Low) accurately reflects the constrained real-world risk. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to PostgreSQL 18.5, 16.15, 15.19, or 14.24 depending on the major version branch in use; these are the fixed releases confirmed by the vendor advisory at https://www.postgresql.org/support/security/CVE-2026-14673/. … Detailed patch versions, workarounds, and compensating controls in full report. |
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