{"id":"CVE-2026-111438","title":"check_hba_replication 认证与访问控制绕过","summary":"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…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","cvssSource":"cna","cwe":["CWE-288"],"vendor":"openGauss-server","product":"openGauss-server","affected":["openGauss-server 3.0.0-3.0.5","openGauss-server 3.1.0-3.1.1","openGauss-server 5.0.0-RC1","openGauss-server 5.0.0-5.0.3","openGauss-server 6.0.0-RC1","openGauss-server 6.0.0-6.0.6","openGauss-server 7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3"],"published":"2026-10-19","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:08:03.265Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111438","references":[{"url":"https://gitcode.com/opengauss/openGauss-server/pull/9757"}],"tags":["cve.org"],"ingestedAt":"2026-10-19T10:20:54.945Z","slug":"CVE-2026-111438","body":"## Overview\n\n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。\n\n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。\n\n## Affected\n\n- `openGauss-server 3.0.0-3.0.5`\n- `openGauss-server 3.1.0-3.1.1`\n- `openGauss-server 5.0.0-RC1`\n- `openGauss-server 5.0.0-5.0.3`\n- `openGauss-server 6.0.0-RC1`\n- `openGauss-server 6.0.0-6.0.6`\n- `openGauss-server 7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}