{"id":"CVE-2026-81633","summary":"Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment","details":"Improper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay node(id: ...) query with an unhandled KeyError.\n\nAshGraphql.Graphql.Resolver.resolve_node/2 decodes the client-supplied global ID with decode_relay_id/1, which only base64-decodes the string and splits it on : without validating the type segment. The decoded type is passed straight to Map.fetch!(type_to_domain_and_resource_map, type). Because fetch! raises on a missing key, a relay ID whose type segment is a valid atom that is not a relay-exposed type aborts the resolver before its resolve/2 clauses and their rescue handlers run, so the error never becomes a GraphQL error and may expose a stacktrace. Common resource names are easy to guess. The fix uses Map.fetch/2 and returns an Invalid node id error for unknown types.\n\nThis issue affects ash_graphql: from 0.27.0 before 1.11.0.","aliases":["EEF-CVE-2026-81633","GHSA-mrgv-g7gf-r96h"],"modified":"2026-09-01T03:46:19.185366286Z","published":"2026-08-30T18:22:07.096Z","database_specific":{"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"365b3aedc6b36f020e6a2c7dce63fa569243bc4e"},{"fixed":"c8863ed8e5c21f1bfb6125f1d24e78443dfc6351"}]}],"cna_assigner":"EEF","cwe_ids":["CWE-20"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81633.json"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-81633.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-81633"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81633.json"},{"type":"ADVISORY","url":"https://github.com/ash-project/ash_graphql/security/advisories/GHSA-mrgv-g7gf-r96h"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81633"},{"type":"FIX","url":"https://github.com/ash-project/ash_graphql/commit/c8863ed8e5c21f1bfb6125f1d24e78443dfc6351"},{"type":"PACKAGE","url":"https://github.com/ash-project/ash_graphql"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ash-project/ash_graphql","events":[{"introduced":"4c1f8a2d1a3de21d8bb141f6349f82e4f1c88f4a"},{"fixed":"4e2c5476ecfd2c701488627ee46e6eefc58c982e"},{"fixed":"c8863ed8e5c21f1bfb6125f1d24e78443dfc6351"}],"database_specific":{"extracted_events":[{"introduced":"0.27.0"},{"fixed":"1.11.0"}],"source":["DESCRIPTION","REFERENCES"]}}],"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","v1.3.4","v1.3.3","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.1.1","v1.0.1","v1.0.0","1.0.0","v1.0.0-rc.5","v1.0.0-rc.4","v1.0.0-rc.3","v1.0.0-rc.2","v0.28.0","v1.0.0-rc.1","v1.0.0-rc.0","v0.27.1","v0.27.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81633.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}