{"id":"CVE-2026-82744","summary":"Ash.Reactor change step fails open, skipping a change when its where guard raises","details":"Not Failing Securely (Failing Open) vulnerability in ash-project ash skips an Ash.Reactor change when the guard controlling it raises, so a change meant to run does not.\n\nAn Ash.Reactor change step can be gated by where validations that decide whether the change runs. Ash.Reactor.ChangeStep (lib/ash/reactor/steps/change_step.ex) evaluated those guards in apply_where_clauses/3, and apply_validation rescued any exception into {:error, error}. The reduce treated that identically to a guard whose condition was simply not met and bypassed the change. So when a guard raises (for example on attacker-influenced input), a change that enforces a security-relevant modification is skipped rather than failing the step. The fix distinguishes a raised exception (now {:raised, error}) and halts the step with an error, failing closed.\n\nThis issue affects ash: from 3.0.0-rc.17 before 3.32.2.","aliases":["EEF-CVE-2026-82744","GHSA-3xq4-m876-fr88"],"modified":"2026-09-04T11:45:50.359164461Z","published":"2026-09-01T03:39:42.668Z","database_specific":{"cna_assigner":"EEF","cwe_ids":["CWE-636"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82744.json","unresolved_ranges":[{"extracted_events":[{"introduced":"321f43bd05ad9544e693cbf797243693e51a6be4"},{"fixed":"6d2eb86ea8d2ba5ffac89c1b8b9bf46e331feabc"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-82744.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-82744"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82744.json"},{"type":"ADVISORY","url":"https://github.com/ash-project/ash/security/advisories/GHSA-3xq4-m876-fr88"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82744"},{"type":"FIX","url":"https://github.com/ash-project/ash/commit/6d2eb86ea8d2ba5ffac89c1b8b9bf46e331feabc"},{"type":"PACKAGE","url":"https://github.com/ash-project/ash"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ash-project/ash","events":[{"introduced":"0087e0502813aacea6805784b944ea9341287905"},{"fixed":"c4505a40d1f28ddb6a82fa7c12955d511f01d479"},{"fixed":"6d2eb86ea8d2ba5ffac89c1b8b9bf46e331feabc"}],"database_specific":{"extracted_events":[{"introduced":"3.0.0-rc.17"},{"fixed":"3.32.2"}],"source":["DESCRIPTION","REFERENCES"]}}],"versions":["v3.32.1","v3.31.3","v3.31.2","v3.31.1","v3.31.0","v3.30.1","v3.30.0","v3.29.3","v3.29.2","v3.29.1","v3.29.0","v3.28.0","v3.27.8","v3.27.7","v3.27.6","v3.27.4","v3.27.3","v3.27.2","v3.27.1","v3.27.0","v3.26.0","v3.25.2","v3.25.1","v3.25.0","v3.24.7","v3.24.6","v3.24.5","v3.24.4","v3.24.3","v3.24.2","v3.24.1","v3.24.0","v3.23.1","v3.23.0","v3.22.2","v3.22.1","v3.22.0","v3.21.3","v3.21.2","v3.21.1","v3.21.0","v3.20.0","v3.19.3","v3.19.2","v3.19.1","v3.19.0","v3.18.0","v3.17.1","v3.17.0","v3.16.0","v3.15.0","v3.14.1","v3.14.0","v3.13.2","v3.13.1","v3.13.0","v3.12.0","v3.11.3","v3.11.2","v3.11.1","v3.11.0","v3.10.1","v3.10.0","v3.9.0","v3.8.0","v3.7.6","v3.7.5","v3.7.4","v3.7.3","v3.7.2","v3.7.1","v3.7.0","v3.6.3","v3.6.2","v3.6.1","v3.6.0","v3.5.43","v3.5.42","v3.5.41","v3.5.39","v3.5.38","v3.5.37","v3.5.36","v3.5.35","v3.5.33","v3.5.32","v3.5.31","v3.5.30","v3.5.29","v3.5.28","v3.5.27","v3.5.26","v3.5.25","v3.5.24","v3.5.23","v3.5.22","v3.5.21","v3.5.19","v3.5.18","v3.5.17","v3.5.16","v3.5.15","v3.5.14","v3.5.13","v3.5.12","v3.5.11","v3.5.10","v3.5.8","v3.5.7","v3.5.6","v3.5.5","v3.5.4","v3.5.3","v3.5.2","v3.5.1","v3.4.73","v3.4.72","v3.4.71","v3.4.70","v3.4.69","v3.4.68","v3.4.67","v3.4.66","v3.4.65","v3.4.64","v3.4.63","v3.4.62","v3.4.61","v3.4.59","v3.4.58","v3.4.57","v3.4.56","3.4.56","v3.4.55","v3.4.54","v3.4.53","v3.4.51","v3.4.50","v3.4.48","v3.4.47","v3.4.46","v3.4.45","v3.4.44","v3.4.43","v3.4.42","v3.4.41","v3.4.40","v3.4.39","v3.4.38","v3.4.37","v3.4.36","v3.4.35","v3.4.34","v3.4.33","v3.4.32","v3.4.31","v3.4.30","v3.4.29","v3.4.28","v3.4.27","v3.4.26","v3.4.25","v3.4.24","v3.4.23","v3.4.21","v3.4.20","v3.4.19","v3.4.18","v3.4.17","v3.4.16","v3.4.15","v3.4.14","v3.4.13","v3.4.12","v3.4.11","v3.4.10","v3.4.9","v3.4.8","v3.4.7","v3.4.6","v3.4.5","v3.4.4","v3.4.3","v3.4.2","v3.4.1","v3.3.3","v3.3.2","v3.3.1","v3.3.0","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.1.8","v3.1.7","v3.1.6","v3.1.5","v3.1.1","v3.0.16","v3.0.15","v3.0.14","v3.0.13","v3.0.12","v3.0.11","v3.0.10","v3.0.9","v3.0.8","v3.0.7","v3.0.6","v3.0.5","v3.0.4","v3.0.3","3.0.3","v3.0.2","v3.0.1","v3.0.0-rc.46","v3.0.0-rc.45","v3.0.0-rc.44","v3.0.0-rc.43","v3.0.0-rc.42","v3.0.0-rc.41","v3.0.0-rc.40","v3.0.0-rc.38","v3.0.0-rc.37","v3.0.0-rc.36","v3.0.0-rc.35","v3.0.0-rc.34","v3.0.0-rc.33","v3.0.0-rc.32","v3.0.0-rc.31","v3.0.0-rc.30","v3.0.0-rc.29","v3.0.0-rc.27","v3.0.0-rc.26","v3.0.0-rc.25","v3.0.0-rc.24","v3.0.0-rc.23","v3.0.0-rc.22","v3.0.0-rc.21","v3.0.0-rc.20","v3.0.0-rc.19","v3.0.0-rc.18","v3.0.0-rc.17"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82744.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}