{"id":"CVE-2026-43937","summary":"YAF.NET: Pre-Handler Authorization Bypass on Admin Pages Enabling Blind SQL Execution via `/Admin/RunSql`","details":"YetAnotherForum.NET (YAF.NET) is a C# ASP.NET forum. Prior to 4.0.5, Any admin OnPost… handler executes its side effects before the ResultFilterAttribute rewrites the response to a 302 to /Info/4. The most impactful abuse is /Admin/RunSql, whose OnPostRunQuery binds Editor from the POST body and passes it straight to IDbAccess.RunSql with no caller check, yielding arbitrary SQL execution for any low-privileged user. This vulnerability is fixed in 4.0.5.","aliases":["GHSA-xhw7-j96h-c3g5"],"modified":"2026-08-12T03:51:46.257035810Z","published":"2026-05-12T14:00:35.599Z","database_specific":{"cwe_ids":["CWE-841","CWE-89"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43937.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43937.json"},{"type":"ADVISORY","url":"https://github.com/YAFNET/YAFNET/security/advisories/GHSA-xhw7-j96h-c3g5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43937"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yafnet/yafnet","events":[{"introduced":"0"},{"fixed":"3cb0ee7fbc01f8d3e84eaddf55350aced2dd4bfc"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"4.0.5"}]}}],"versions":["v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v4.0.0-rc.4","v4.0.0-rc.3","v4.0.0-rc.2","v4.0.0-rc.1","v4.0.0-beta.7","v4.0.0-beta.3","v4.0.0-beta.1","3.1.13.0","v3.1.10","v3.1.9","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.4","v3.1.3","v3.1.2","v3.1.1","v3.1.0","v3.0.2","v2.3.1.0","v2.3.0.5-beta.1","v2.3.0.4","v2.3.0.4-beta.1","v2.3.0.0","v2.3.0.0-rc.5","v2.3.0.0-rc.4","v2.3.0.0-rc.3","v2.3.0.0-rc.2","v2.3.0.0-rc.1","v2.3.0.0-beta.4","v2.3.0.0-beta.3","v2.3.0.0-beta.2","v2.3.0.0-BETA1","v2.2.4.19","v2.2.4.18","v2.2.4.10","v2.2.4.9","v2.2.4.8","v2.2.4.7","v2.2.4.6","v2.2.4.5","v2.2.4.4","v2.2.4.3","v2.2.4.2","v2.2.4.1","v2.2.4.0","v2.2.4.0-nightly","v2.2.3","v2.2.3.0-nightly.118","v2.2.3.0-nightly.115","v2.2.2","v2.2.2.0-nightly.76","v2.2.1","v2.2.1.0-nightly.20","v2.2.0","v2.2.0-rc.1","v2.2.0-beta.1","v2.1.2-beta.1","v2.1.2","v2.1","v2.0.0","release_2_0_0_RC1","release_1_9_6_1_RTW","release_1_9_6_FINAL","release_1_9_6_RC1","release_1_9_6_BETA1","release_1_9_5_5_RTW","release_1_9_5_5_BETA","release_1_9_5_RC1","release_1_9_4_FINAL","release_1_9_4_BETA","release_1_0_2","aspnet20a","complete2","complete","release_0_9_9b","release_0_9_9","yaf_dnn2","release_0_9_8B","release_0_9_8","release_0_9_7","release_0_9_6","release_0_9_5","release_0_9_4","release_0_9_3","release_0_9_2","release_0_9_1","release_0_9_0","release_0_8_2","release_0_8_1","start"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43937.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}