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CVE-2026-96538— WarehousePG pg_file_write/pg_file_rename/pg_file_unlink/pg_logdir_ls privilege escalation

Quick assessment

Affected
EnterpriseDB WarehousePG
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WarehousePG (WHPG) 7.x 在 7.6.0-WHPG 之前的版本中存在授权缺失漏洞（CWE-862），影响其内置的服务器端文件函数： 、 、 和 。这些函数无需任何 GRANT 权限即可被任何经过身份验证的数据库角色执行。这是因为，在 Greenplum 将代码库合并到 PostgreSQL 12 基础版本的过程中，这些函数的目录项被重新指向了源自 adminpack 的、未加访问控制的实现，而原本由 模块对等效函数施加的 REVOKE（权限回收）操作并未迁移到 WHPG 核心代码中。 非超级用户

CVSS 8.7 · High
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I. Basic Information for CVE-2026-96538

Vulnerability Information
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Vulnerability Title
WarehousePG pg_file_write/pg_file_rename/pg_file_unlink/pg_logdir_ls privilege escalation
Source: CVE Program / CVE List V5
Vulnerability Description
WarehousePG (WHPG) 7.x before 7.6.0-WHPG is affected by a missing authorization vulnerability (CWE-862) in the built-in server-side file functions pg_file_write(text,text,bool), pg_file_rename(text,text,text), pg_file_unlink(text), and pg_logdir_ls(). These functions are executable by any authenticated database role with no GRANT required, because the REVOKE that contrib/adminpack applies to the equivalent functions was never carried over to WHPG core when their catalog entries were repointed to the ungated adminpack-derived implementations as part of Greenplum's merge to a PostgreSQL 12 base. A non-superuser can use pg_file_write, pg_file_rename, and pg_file_unlink to create, overwrite (append), rename, and delete files under the data and log directories, and can use pg_logdir_ls() to enumerate log file names. Because postgresql.auto.conf resides in the data directory, a non-superuser can append configuration directives such as shared_preload_libraries or archive_command to it, resulting in arbitrary code execution as the postgres operating system user on the next server restart or configuration reload. WarehousePG 6.x is not affected, as the equivalent functions there enforce a superuser check internally.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
EnterpriseDB WarehousePG 7.0.0 ~ 7.6.0-WHPG -

II. Public POCs for CVE-2026-96538

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III. Intelligence Information for CVE-2026-96538

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Other References for CVE-2026-96538 (2)

IV. Related Vulnerabilities

Same vendor: EnterpriseDB
Same weakness: CWE-862

V. Comments for CVE-2026-96538

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