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CVE-2026-80223— Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read

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 存在授权校验不当的漏洞：来自一个租户的已认证订阅者可以通过 GraphQL 订阅接收到另一个租户的记录。 ash_graphql 中订阅解析器（AshGraphql.Graphql.Resolver）在内存中对每个通知载荷进行授权校验：其快速路径调用 时设置了 ，通过 对内存中的记录评估读策略过滤条件，且不会发出任何数据库查询。由于多租户隔离是在查询构建阶段和数据层前缀阶段应用的，而不是在 内部，因此评估后的策略不包含租户条件，当策略过滤条件为真时，来自租户 B

CVSS 7.1 · High
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I. Basic Information for CVE-2026-80223

Vulnerability Information
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Vulnerability Title
Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped read
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect Authorization vulnerability in ash-project ash_graphql allows an authenticated subscriber in one tenant to receive another tenant's records over GraphQL subscriptions. The subscription resolver in AshGraphql.Graphql.Resolver authorizes each notification payload in memory: its fast path calls Ash.can/3 with run_queries?: false, which evaluates the read policy filter against the in-memory record via Ash.Expr.eval/2 and never issues a query. Ash applies multitenancy at query-build and data-layer-prefix time, not inside query.filter, so the evaluated policy carries no tenant condition and a tenant-B notification routed to a tenant-A subscriber is emitted whenever the policy filter is true. The single-notification clause has no tenant guard at all, and the batched clause checks only the head of the notification list, so non-head entries authorize purely in memory. A tenant-scoped read is reached only when filter evaluation fails. This issue affects ash_graphql: from 1.4.0 before 1.11.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash_graphql 1.4.0 ~ 1.11.0 cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*
ash-project ash_graphql 4c377e541a2adb6befc651f3dccc6a797bc58ba9 ~ 6e30b8b5a04bdeaed5d7514caa6b2d056d8d993e cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-80223

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III. Intelligence Information for CVE-2026-80223

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Other References for CVE-2026-80223 (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-2026-78693 6.9 MEDIUM Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal f
CVE-2026-81633 6.9 MEDIUM Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type
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-863

V. Comments for CVE-2026-80223

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