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CVE-2026-81633— Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment

Quick assessment

Affected
ash-project ash_graphql
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ash_project 中 ash_graphql 存在输入验证不当漏洞，允许未经身份验证的客户端通过触发未处理的 KeyError 使 relay 节点（id: ...）查询崩溃。 AshGraphql.Graphql.Resolver 中的 resolve_node/2 使用 decode_relay_id/1 解码客户端提供的全局 ID。该函数仅对字符串进行 base64 解码并按“:”分割，但未验证类型段。解码出的类型直接传递给 Map.fetch!(type_to_domain_and_resource_

CVSS 6.9 · Medium
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I. Basic Information for CVE-2026-81633

Vulnerability Information
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Vulnerability Title
Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay node(id: ...) query with an unhandled KeyError. AshGraphql.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. This issue affects ash_graphql: from 0.27.0 before 1.11.0.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash_graphql 0.27.0 ~ 1.11.0 cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*
ash-project ash_graphql 365b3aedc6b36f020e6a2c7dce63fa569243bc4e ~ c8863ed8e5c21f1bfb6125f1d24e78443dfc6351 cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-81633

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III. Intelligence Information for CVE-2026-81633

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Other References for CVE-2026-81633 (4)

Same Patch Batch · ash-project · 2026-08-30 · 20 CVEs total

CVE-2026-81636 8.7 HIGH Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables de
CVE-2026-78699 7.2 HIGH rename_tenant returns :ok on a failed rename, enabling cross-tenant access in AshPostgres
CVE-2026-80223 7.1 HIGH Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory with
CVE-2026-78693 6.9 MEDIUM Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal f
CVE-2026-77454 5.9 MEDIUM exists/2 predicate silently dropped on limited relationships with a parent() filter in Ash
CVE-2026-81319 5.9 MEDIUM Unsafe deserialization of decrypted terms enables node DoS in AshCloak
CVE-2026-75847 5.9 MEDIUM Sensitive attribute values stored in a non-sensitive public changes map in AshPaperTrail
CVE-2026-78228 5.9 MEDIUM Unbounded handle_error recursion enables denial of service in AshOban triggers
CVE-2026-78038 5.9 MEDIUM Job argument injection via :args overrides primary_key and tenant in AshOban
CVE-2026-77970 5.9 MEDIUM Sensitive fields nested in embedded values are not redacted in AshPaperTrail versions
CVE-2026-82367 2.3 LOW Re-entrant synchronous publish in AshGraphql subscription batcher delivers one subscriber'
CVE-2026-81643 2.3 LOW Broken access control in AshGraphql subscription batcher applies authorization suppression
CVE-2026-80227 2.1 LOW SQL string_trim removes only spaces, diverging from in-memory trimming in AshSql
CVE-2026-78691 2.1 LOW Unescaped backslash allows LIKE wildcard injection in AshSql string search
CVE-2026-81316 2.1 LOW Same-named aggregates with differing filters are conflated in AshSql
CVE-2026-81318 2.1 LOW Distinct-query aggregate drops the tenant schema prefix, leaking across tenants in AshSql
CVE-2026-81322 2.1 LOW Cloaked plaintext leaks through a non-sensitive action argument in AshCloak
CVE-2026-77846 2.1 LOW JSON path injection via unescaped get_path segments in AshSqlite
CVE-2026-77831 2.1 LOW Algorithmic-complexity denial of service in AshPaperTrail full-diff list tracking

IV. Related Vulnerabilities

Same product: ash_graphql
Same vendor: ash-project
Same weakness: CWE-20

V. Comments for CVE-2026-81633

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