CVE-2026-111438— check_hba_replication 认证与访问控制绕过
Quick assessment
Affected
openGauss-server openGauss-server
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.
In of openGauss-server, there is an access control bypass in the replication connection authentication process. The function does not invoke when handling HADR/SW replication sender connections; instead, it directly calls . This function performs only a weak m
Possible ATT&CK Techniques 3 AI
T1078 · Valid Accounts T1530 · Data from Cloud Storage T1552 · Unsecured CredentialsAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| openGauss-server | openGauss-server | 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 | ||
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 |
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I. Basic Information for CVE-2026-111438
Vulnerability Information
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Vulnerability Title
check_hba_replication 认证与访问控制绕过
Source: CVE Program / CVE List V5
Vulnerability Description
在 openGauss-server 的 src/common/backend/libpq/hba.cpp 中，复制连接认证存在访问控制绕过。hba_getauthmethod() 在处理 HADR/SW 复制发送方时，不要求 is_node_internal_connection()，直接调用 check_hba_replication()。check_hba_replication() 仅按 replication 标记做弱匹配，缺少普通 check_hba() 中的远程 trust 禁止等完整校验。因此，非内部网络的 HADR/SW 复制连接可绕过内部连接限制和完整 pg_hba 策略完成认证，进而通过复制协议读取备份与日志数据。
此问题随 HADR 复制发送方绕过内部连接校验进入代码，自 3.0.0 起即存在。受影响版本包括 3.0.x、3.1.x、5.0.x、5.1.0、6.0.x，以及 7.0.0-RC1、7.0.0-RC2、7.0.0-RC3。该问题已在 7.0.0-LTS版本修复，通过要求 HADR/SW 复制发送方必须经过 is_node_internal_connection 校验，使外部复制连接改走普通 check_hba() 并触发禁止远程 trust 策略。修复pr见https://gitcode.com/opengauss/openGauss-server/pull/9757。
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| openGauss-server | openGauss-server | 3.0.0-3.0.5 | - |
|
II. Public POCs for CVE-2026-111438
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-111438 (1)
Same Patch Batch · openGauss-server · 2026-10-19 · 4 CVEs total
| CVE-2026-111441 | 8.1 HIGH | HLL 反序列化 lenTotal/lenUsed 校验缺失导致堆越界写 |
| CVE-2026-111440 | 7.0 HIGH | JDBC LogFactory 任意类加载/构造导致潜在 RCE |
| CVE-2026-111439 | 4.3 MEDIUM | 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 |
IV. Related Vulnerabilities
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