CVE-2026-111439

pg_read_binary_file_blocks 缺少初始用户权限校验，普通用户可读取 relation 文件块

Published Oct 19, 2026 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed

Description

在 openGauss-server的 src/common/backend/utils/adt/genfile.cpp 模块中，内置函数 pg_read_binary_file_blocks() 存在权限校验逻辑缺陷。该函数在入口处仅校验了起始块号（startBlockNum）和块数量（blockCount）的范围，随后直接调用底层文件读取例程 ReadBinaryFileBlocksFirstCall()。该底层例程仅执行了路径规范化检查以及针对 .. 路径遍历和数据目录边界的基本检查，缺失了对调用者数据库权限（如 SELECT 权限）的校验。此外，辅助函数 is_row_data_file() 也仅用于识别文件形态，未包含权限检查。因此，任何拥有普通数据库连接权限的用户，只要能够通过 pg_relation_filepath() 等函数获取到目标表的底层关系文件路径（例如压缩数据的 _compress 文件路径），即可无需具备该表的 SELECT 权限，直接读取表数据的二进制块。
此漏洞影响此前3.0.0到6.0.0间的所有版本及补丁版，并在7.0.0-LTS版本修复。修复patch详见：https://gitcode.com/opengauss/openGauss-server/pull/9374。

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

openGauss-server

unaffected

Version	Status	Constraints
`7.0.0-LTS`	unaffected	—
`3.0.0-3.0.5`	affected	—
`3.1.0-3.1.1`	affected	—
`5.0.0-RC1`	affected	—
`5.0.0-5.0.3`	affected	—
`5.1.0`	affected	—
`6.0.0-RC1`	affected	—
`6.0.0-6.0.6`	affected	—
`7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3`	affected	—

No data.

Vendor Product Versions

Opengauss-server

Version	Status	Scheme	Platform
`7.0.0-LTS`	unaffected	semver	['openeuler_centos']
`[3.0.0,3.0.5]`	affected	semver	['openeuler_centos']
`[3.1.0,3.1.1]`	affected	semver	['openeuler_centos']
`5.0.0-RC1`	affected	semver	['openeuler_centos']
`[5.0.0,5.0.3]`	affected	semver	['openeuler_centos']
`5.1.0`	affected	semver	['openeuler_centos']
`6.0.0-RC1`	affected	semver	['openeuler_centos']
`[6.0.0,6.0.6]`	affected	semver	['openeuler_centos']
`7.0.0-RC1`	affected	semver	['openeuler_centos']
`7.0.0-RC2`	affected	semver	['openeuler_centos']
`7.0.0-RC3`	affected	semver	['openeuler_centos']

Remediation

No solution or workaround provided in the CVE record

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.259% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://gitcode.com/opengauss/openGauss-server/pull/9374

History

Oct 21, 2026 5:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Opengauss-server Opengauss-server opengauss-server
Vendors & Products		Opengauss-server Opengauss-server opengauss-server

Oct 19, 2026 6:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 19, 2026 8:15 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		在 openGauss-server的 src/common/backend/utils/adt/genfile.cpp 模块中，内置函数 pg_read_binary_file_blocks() 存在权限校验逻辑缺陷。该函数在入口处仅校验了起始块号（startBlockNum）和块数量（blockCount）的范围，随后直接调用底层文件读取例程 ReadBinaryFileBlocksFirstCall()。该底层例程仅执行了路径规范化检查以及针对 .. 路径遍历和数据目录边界的基本检查，缺失了对调用者数据库权限（如 SELECT 权限）的校验。此外，辅助函数 is_row_data_file() 也仅用于识别文件形态，未包含权限检查。因此，任何拥有普通数据库连接权限的用户，只要能够通过 pg_relation_filepath() 等函数获取到目标表的底层关系文件路径（例如压缩数据的 _compress 文件路径），即可无需具备该表的 SELECT 权限，直接读取表数据的二进制块。此漏洞影响此前3.0.0到6.0.0间的所有版本及补丁版，并在7.0.0-LTS版本修复。修复patch详见：https://gitcode.com/opengauss/openGauss-server/pull/9374。
Title		pg_read_binary_file_blocks 缺少初始用户权限校验，普通用户可读取 relation 文件块
Weaknesses		CWE-862
References		https://gitcode.com/opengauss/openGauss-server/pull/9374
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}`