EUVD-2026-68928Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
AC:H reflects the AT:P precondition (handler fallthrough required); PR:N as no credentials needed; C:L since only specific struct fields are exposed rather than full system confidentiality.
Primary rating from Vendor (EEF).
CVSS VectorVendor: EEF
Lifecycle Timeline
2DescriptionCVE.org
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.
When 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.
This 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.
This issue affects ash_typescript: from 0.15.0 before 0.18.0.
AnalysisAI
Sensitive application data leaks from HTTP 500 responses in ash_typescript versions 0.15.0 through 0.17.x due to an ungated code path that serializes handler return values verbatim using Elixir's inspect/2. Any unauthenticated caller who can trigger a typed-controller route whose handler falls through with a non-conn term - such as {:error, %User{}} - receives the full Elixir struct inspection, potentially including hashed passwords, session tokens, and tenant identifiers, in the JSON error body. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that at least one typed-controller route handler in the target application returns a value other than %Plug.Conn{} - for example, an error tuple such as {:error, %SomeStruct{}} or a bare map or atom. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.3 (AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N) reflects two competing signals: network-reachable with no privileges or user interaction required (PR:N, AV:N), but AT:P (Attack Requirements: Present) indicating a deployment-specific precondition - a route handler must return a non-conn value. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade ash_typescript to version 0.18.0 or later, which gates the unexpected-return detail behind the typed_controller_show_raised_errors configuration flag (defaulting to false), matching the behavior of the existing exception rescue path. … Detailed patch versions, workarounds, and compensating controls in full report. |
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