{"affected":[{"package":{"ecosystem":"Hex","name":"ash_graphql","purl":"pkg:hex/ash_graphql"},"ranges":[{"events":[{"introduced":"1.4.0"},{"fixed":"1.11.0"}],"type":"SEMVER"}],"versions":["1.4.0","1.4.1","1.4.2","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.5.0","1.5.1","1.6.0","1.7.0","1.7.1","1.7.2","1.7.3","1.7.4","1.7.5","1.7.6","1.7.7","1.7.8","1.7.9","1.7.10","1.7.11","1.7.12","1.7.13","1.7.14","1.7.15","1.7.16","1.7.17","1.8.0","1.8.1","1.8.2","1.8.3","1.8.4","1.8.5","1.9.0","1.9.1","1.9.2","1.9.3","1.9.4","1.10.0","1.10.1"]},{"ranges":[{"events":[{"introduced":"3cb2c9870d050c7c4bba6c211aaed97d732f7e81"},{"fixed":"e8e67f39add2ce0771e6db5f086afe68ba212c57"}],"repo":"https://github.com/ash-project/ash_graphql","type":"GIT"}]}],"aliases":["GHSA-j684-hch4-q888","CVE-2026-81643"],"credits":[{"name":"Peter Ullrich","type":"FINDER"},{"name":"Peter Ullrich","type":"REPORTER"},{"name":"Zach Daniel / Ash Project","type":"REMEDIATION_DEVELOPER"},{"name":"Jonatan Männchen / EEF","type":"COORDINATOR"}],"database_specific":{"capec_ids":["CAPEC-1"],"cpe_ids":["cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*"],"cwe_ids":["CWE-863"]},"details":"## Summary\n\nIncorrect Authorization vulnerability in ash-project ash\\_graphql delivers GraphQL subscription payloads for records a subscriber is not authorized to see.\n\nIn AshGraphql.Subscription.Batcher, do\\_send/5 resolves the first notification of a batch and filters it with should\\_send?/1, which drops results whose errors are coded forbidden or not\\_found or carry no code, precisely so that unauthorized results are not disclosed. The remaining notifications in the batch are read from the process dictionary, re-run through the pipeline, and appended to the outgoing results without that filter. They reach pubsub.publish\\_subscription/2, and the not is\\_nil(record) guard drops only nil records, not error-carrying results. Any two qualifying notifications arriving within the default one-second batch interval suffice, and batching is the default path. The fix applies should\\_send?/1 to the whole batch.\n\nThis issue affects ash\\_graphql: from 1.4.0 before 1.11.0.\n\n## Configuration\n\nThe application exposes ash\\_graphql subscriptions with Ash authorization enabled, and two or more notifications are batched together within the batch interval (the default path).","id":"EEF-CVE-2026-81643","modified":"2026-08-30T18:20:36.104698Z","published":"2026-08-30T18:20:35.564Z","references":[{"type":"ADVISORY","url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-j684-hch4-q888"},{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-81643.html"},{"type":"FIX","url":"https://github.com/ash-project/ash_graphql/commit/e8e67f39add2ce0771e6db5f086afe68ba212c57"},{"type":"PACKAGE","url":"https://hex.pm/packages/ash_graphql"}],"related":[],"schema_version":"1.7.3","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","type":"CVSS_V4"}],"summary":"Broken access control in AshGraphql subscription batcher applies authorization suppression to only the first notification","upstream":[]}