Internal error terms inspected into AshTypescript RPC error responses

Summary

CVE	CVE-2026-105283
State	PUBLISHED
Assigner	EEF
Source Priority	CVE Program / NVD first with legacy fallback
Published	2026-10-12 12:17:12 UTC
Updated	2026-10-13 14:31:20 UTC
Description	Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal Elixir terms from an RPC error response by provoking an error the error builder has no dedicated clause for. AshTypescript.Rpc.ErrorBuilder.build_error_response/1 in lib/ash_typescript/rpc/error_builder.ex renders a pipeline error term that matches no specific clause with inspect/1 and places the result in details.error of the client-facing error. Ash exceptions take a separate path in AshTypescript.Rpc.Errors where unhandled cases are redacted behind an errorId, but these fallbacks have no redaction, so whatever the term carries reaches the HTTP or channel response. Two request paths hand it such terms: a struct-typed action argument with an invalid nested value, where cast_map_to_struct/2 in lib/ash_typescript/rpc/input_formatter.ex throws the raw Ash.Type cast error into the builder, and field selection on a generic action that returns a primitive, where format_field_type/1 inspects the full Ash.Info.Manifest.Type struct into vars.returnType. Resource module names in vars.resource are not treated as sensitive and are out of scope. This issue affects ash_typescript: from 0.1.0 before 0.19.1.

Risk And Classification

Primary CVSS: v4.0 6.3 MEDIUM from 6b3ad84c-e1a6-4bf7-a703-f496b71e49db

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

Problem Types: CWE-209 | CWE-209 CWE-209 Generation of Error Message Containing Sensitive Information

Version	Source	Type	Score	Severity	Vector
4.0	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	Secondary	6.3	MEDIUM	`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/C...`
4.0	CNA	CVSS	6.3	MEDIUM	`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`

CVSS v4.0 Breakdown

Attack Vector

Network

Attack Complexity

Low

Attack Requirements

Present

Privileges Required

None

User Interaction

None

Confidentiality

Low

Integrity

None

Availability

None

Sub Conf.

None

Sub Integrity

None

Sub Availability

None

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

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Ash-project	Ash Typescript	affected 0.1.0 0.19.1 semver	Not specified
CNA	Ash-project	Ash Typescript	affected 8e204ce34e24a158cf22a2dac4d53c44716c9e30 4b3c65203ee78dc992d6d2e6559625c5460a01cd git	Not specified

References

Reference	Source	Link	Tags
cna.erlef.org/cves/CVE-2026-105283.html	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	cna.erlef.org
osv.dev/vulnerability/EEF-CVE-2026-105283	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	osv.dev
github.com/ash-project/ash_typescript/commit/4b3c65203ee78dc992d6d2e6559...	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	github.com
github.com/ash-project/ash_typescript/security/advisories/GHSA-7gxc-w225...	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	github.com
github.com/ash-project/ash_typescript/commit/8e204ce34e24a158cf22a2dac4d...	6b3ad84c-e1a6-4bf7-a703-f496b71e49db	github.com
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Peter Shoukry / Udin (en)

CNA: Torkild Gundersen Kjevik / Ash Project (en)

CNA: Jonatan Männchen / EEF (en)

There are currently no legacy QID mappings associated with this CVE.