{"id":"CVE-2026-115627","title":"AshPostgres ignores attribute multitenancy on the join resource when loading many_to_many and through relationships, returning records related through other tenants' rows","summary":"Incorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.\n\nWhen a many_to_many relationship, or a through relationship, …","severity":"medium","cvss":6,"cvssVector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-863"],"vendor":"ash-project","product":"ash_postgres","affected":["ash_postgres >= 0.38.0 < 2.15.2","ash-project/ash_postgres >= 7115bec58678f13b1ac2fb4822a0ba1aea9dbec5 < 8c25c945c39a45299193fe70b09fc2fa2aacac7b"],"published":"2026-10-25","updated":"2026-10-25","sourceUpdated":"2026-10-25T19:49:50.510Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-115627","references":[{"url":"https://github.com/ash-project/ash/security/advisories/GHSA-gr2r-f49c-9gm2","label":"AshPostgres ignores attribute multitenancy on the join resource when loading `many_to_many` and `through` relationships, returning records related through other tenants' rows"},{"url":"https://cna.erlef.org/cves/CVE-2026-115627.html","label":"EEF CNA record for CVE-2026-115627"},{"url":"https://osv.dev/vulnerability/EEF-CVE-2026-115627","label":"OSV record EEF-CVE-2026-115627"},{"url":"https://github.com/ash-project/ash_postgres/commit/7115bec58678f13b1ac2fb4822a0ba1aea9dbec5","label":"Introducing commit 7115bec in ash-project/ash_postgres"},{"url":"https://github.com/ash-project/ash_postgres/commit/8c25c945c39a45299193fe70b09fc2fa2aacac7b","label":"Fix commit 8c25c94 in ash-project/ash_postgres"}],"tags":["cve.org"],"ingestedAt":"2026-10-25T22:08:29.761Z","slug":"CVE-2026-115627","body":"## Overview\n\nIncorrect Authorization vulnerability in ash-project ash_postgres allows a user to load destination records linked to a source record only through another tenant's join rows.\n\nWhen a many_to_many relationship, or a through relationship, is loaded with a lateral join (for example with a per-record limit or sort), AshPostgres.DataLayer builds the query for the join resource, and for each resource along a through path, in lateral_join_query/3 and through_step_queries/4 without running that resource's read action, which is where attribute multitenancy is applied. When those resources use strategy :attribute multitenancy, rows belonging to other tenants were joined, so the load returned destination records that the caller's tenant is not related to.\n\nThis issue affects ash_postgres: from 0.38.0 before 2.15.2.\n\n## Affected\n\n- `ash_postgres >= 0.38.0 < 2.15.2`\n- `ash-project/ash_postgres >= 7115bec58678f13b1ac2fb4822a0ba1aea9dbec5 < 8c25c945c39a45299193fe70b09fc2fa2aacac7b`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":33,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}