{"schema":"threatline.record/2","record":{"id":"CVE-2026-111439","aliases":[],"summary":"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","details":"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。\n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。","categories":["Unclassified"],"product":"openGauss-server","vendor":"openGauss-server","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111439","source_modified_at":"2026-10-19T17:25:07.334Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"openGauss-server","vendor":"openGauss-server","versions":[{"status":"unaffected","version":"7.0.0-LTS"},{"status":"affected","version":"3.0.0-3.0.5"},{"status":"affected","version":"3.1.0-3.1.1"},{"status":"affected","version":"5.0.0-RC1"},{"status":"affected","version":"5.0.0-5.0.3"},{"status":"affected","version":"5.1.0"},{"status":"affected","version":"6.0.0-RC1"},{"status":"affected","version":"6.0.0-6.0.6"},{"status":"affected","version":"7.0.0-RC1, 7.0.0-RC2, 7.0.0-RC3"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":4.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00259,"percentile":0.16618,"score_date":"2026-10-23"},"published_at":"2026-10-19T07:59:44.700Z","modified_at":"2026-10-19T17:25:07.334Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111439","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T17:25:07.334Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111439","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://gitcode.com/opengauss/openGauss-server/pull/9374"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-19T17:24:53.483125Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-19T17:25:07.334Z","content_hash":"20e5f100ff71fb8058b81151bdabd3277592ea2a424fb6c623acbf87cbe45cbe"}}