{"id":"CVE-2026-82733","state":"PUBLISHED","title":"Route handler return value echoed into AshTypescript error response","description":"Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.\n\nWhen a typed-controller route handler returns anything other than a %Plug.Conn{}, dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex passes the value to unexpected_return/2, which interpolates inspect(value, limit: 50) directly into the response message. The limit option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as {:error, %User{}} or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.\n\nThis contradicts the module's own posture elsewhere: the rescue clause gates Exception.message/1 behind AshTypescript.typed_controller_show_raised_errors?/0 and otherwise returns a generic message, while this path is ungated and always echoes.\n\nThis issue affects ash_typescript: from 0.15.0 before 0.18.0.","publishedAt":"2026-09-01T02:09:22.784Z","updatedAt":"2026-09-01T15:12:07.507Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","source":"EEF"},"assigner":"EEF","products":["ash-project ash_typescript"],"affected":[{"vendor":"ash-project","product":"ash_typescript","packageName":"ash_typescript","packageURL":"pkg:hex/ash_typescript","defaultStatus":"unaffected","versions":[{"version":"0.15.0","status":"affected","lessThan":"0.18.0","versionType":"semver"}],"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshTypescript.TypedController.RequestHandler'"],"programFiles":["lib/ash_typescript/typed_controller/request_handler.ex"],"programRoutines":[{"name":"'Elixir.AshTypescript.TypedController.RequestHandler':unexpected_return/2"},{"name":"'Elixir.AshTypescript.TypedController.RequestHandler':handle/4"}],"repo":"https://github.com/ash-project/ash_typescript"},{"vendor":"ash-project","product":"ash_typescript","packageName":"ash-project/ash_typescript","packageURL":"pkg:github/ash-project/ash_typescript","defaultStatus":"unaffected","versions":[{"version":"546a15e1a2d7dbf1df2d5a6ee4404bc3da87852e","status":"affected","lessThan":"dec80e29543f96e43eeece8501376562f17ac638","versionType":"git"}],"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*"],"modules":["'Elixir.AshTypescript.TypedController.RequestHandler'"],"programFiles":["lib/ash_typescript/typed_controller/request_handler.ex"],"programRoutines":[{"name":"'Elixir.AshTypescript.TypedController.RequestHandler':unexpected_return/2"},{"name":"'Elixir.AshTypescript.TypedController.RequestHandler':handle/4"}],"repo":"https://github.com/ash-project/ash_typescript"}],"references":["https://github.com/ash-project/ash_typescript/security/advisories/GHSA-ghhw-qh7p-55xr","https://cna.erlef.org/cves/CVE-2026-82733.html","https://osv.dev/vulnerability/EEF-CVE-2026-82733","https://github.com/ash-project/ash_typescript/commit/dec80e29543f96e43eeece8501376562f17ac638"],"weaknesses":["CWE-209"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82733.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82733","state":"PUBLISHED","datePublished":"2026-09-01T02:09:22.784Z","dateUpdated":"2026-09-01T15:12:07.507Z","assignerShortName":"EEF","assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","dateReserved":"2026-08-31T00:59:10.001Z"},"containers":{"cna":{"title":"Route handler return value echoed into AshTypescript error response","descriptions":[{"lang":"en","value":"Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.\n\nWhen a typed-controller route handler returns anything other than a %Plug.Conn{}, dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex passes the value to unexpected_return/2, which interpolates inspect(value, limit: 50) directly into the response message. The limit option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as {:error, %User{}} or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.\n\nThis contradicts the module's own posture elsewhere: the rescue clause gates Exception.message/1 behind AshTypescript.typed_controller_show_raised_errors?/0 and otherwise returns a generic message, while this path is ungated and always echoes.\n\nThis issue affects ash_typescript: from 0.15.0 before 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