{"id":"CVE-2026-81643","summary":"Broken access control in AshGraphql subscription batcher applies authorization suppression to only the first notification","details":"Incorrect 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.","aliases":["EEF-CVE-2026-81643","GHSA-j684-hch4-q888"],"modified":"2026-08-31T03:45:43.198446275Z","published":"2026-08-30T18:20:35.564Z","database_specific":{"cna_assigner":"EEF","cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81643.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"3cb2c9870d050c7c4bba6c211aaed97d732f7e81"},{"fixed":"e8e67f39add2ce0771e6db5f086afe68ba212c57"}]}]},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-81643.html"},{"type":"WEB","url":"https://github.com"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81643.json"},{"type":"PACKAGE","url":"https://github.com/ash-project/ash_graphql"},{"type":"FIX","url":"https://github.com/ash-project/ash_graphql/commit/e8e67f39add2ce0771e6db5f086afe68ba212c57"},{"type":"ADVISORY","url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-j684-hch4-q888"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81643"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-81643"},{"type":"WEB","url":"https://repo.hex.pm"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ash-project/ash_graphql","events":[{"introduced":"cb2296922d48705a7bbabd92daa1ec240cab1e66"},{"fixed":"4e2c5476ecfd2c701488627ee46e6eefc58c982e"}],"database_specific":{"extracted_events":[{"introduced":"1.4.0"},{"fixed":"1.11.0"}],"source":"AFFECTED_FIELD"}}],"versions":["v1.10.1","v1.10.0","v1.9.4","v1.9.3","v1.9.2","v1.9.1","v1.9.0","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.17","v1.7.16","v1.7.15","v1.7.14","v1.7.13","v1.7.12","v1.7.11","v1.7.10","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.0","v1.5.1","v1.5.0","v1.4.7","v1.4.6","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81643.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","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"}]}