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CVE-2026-82745— ETS and Mnesia data layers overwrite an existing record on create instead of enforcing primary-key uniqueness

Quick assessment

Affected
ash-project ash
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 存在不当访问控制（Improper Access Control）漏洞：当使用 ETS 或 Mnesia 数据层时，由于在插入操作中未强制主键唯一性约束，创建（create）操作会覆盖已存在的记录。 与 SQL 数据层不同——SQL 会因主键唯一性约束而拒绝重复主键——ETS 和 Mnesia 数据层将“创建”实现为基于键的插入（keyed insert），会替换任何具有相同主键的现有条目（代码位于 lib/ash/data_layer/ets/ets.ex 和 lib/ash/

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-82745

Vulnerability Information
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Vulnerability Title
ETS and Mnesia data layers overwrite an existing record on create instead of enforcing primary-key uniqueness
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Access Control vulnerability in ash-project ash lets a create action overwrite an existing record when the ETS or Mnesia data layer is used, because neither enforced primary-key uniqueness on insert. Unlike a SQL data layer, whose unique primary-key constraint rejects a duplicate, the ETS and Mnesia data layers implemented create as a keyed insert that replaces any existing entry with the same primary key (lib/ash/data_layer/ets/ets.ex, lib/ash/data_layer/mnesia/mnesia.ex). An actor who can set the primary key on a create (for example a user-supplied string or integer key) can submit a create whose key matches an existing record and silently overwrite it, destroying and replacing another entity's data without going through the update action or its policies. The fix rejects a create whose primary key already exists with an already-taken error, and only allows duplicates for keyless resources. This issue affects ash: from 0.4.0 before 3.32.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash 0.4.0 ~ 3.32.2 cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*
ash-project ash 6dc699d8a683d542812b34a8c104cc90164add3a ~ 912e243196017c2a812c25905c2b1cc3bbb843fc cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82745

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III. Intelligence Information for CVE-2026-82745

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Other References for CVE-2026-82745 (4)

Same Patch Batch · ash-project · 2026-09-01 · 22 CVEs total

CVE-2026-74837 8.7 HIGH Unbounded atom creation from client-supplied RPC field names in AshTypescript field format
CVE-2026-77856 8.2 HIGH Unbounded atom creation from typed struct field names in AshTypescript field selector
CVE-2026-82730 8.2 HIGH Authorization-redacted field values disclosed through AshTypescript result normalization
CVE-2026-77950 6.3 MEDIUM RPC error handler fails open in AshTypescript, disclosing unredacted errors
CVE-2026-82732 6.3 MEDIUM Declared argument constraints not enforced on AshTypescript typed controller routes
CVE-2026-82733 6.3 MEDIUM Route handler return value echoed into AshTypescript error response
CVE-2026-82737 5.9 MEDIUM Ash.Vector wraps the 16-bit dimension header for vectors over 65,535 elements, corrupting
CVE-2026-82735 5.9 MEDIUM Match regex runs on over-length input in Ash.Type.String, enabling regex denial of service
CVE-2026-82749 5.9 MEDIUM Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is
CVE-2026-82738 5.9 MEDIUM Ash.Type.UUIDv7 accepts non-v7 UUIDs that then fail to load, causing persistent denial of
CVE-2026-82742 5.9 MEDIUM Ash.Filter.Runtime materializes a combinatorial cross-product over to-many relationships,
CVE-2026-82746 5.9 MEDIUM Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to for
CVE-2026-82731 2.3 LOW Unescaped path parameters in AshTypescript generated TypeScript client allow request redir
CVE-2026-82739 2.1 LOW Ash.Resource.Validation.Confirm leaks a confirmed field's stored value in the atomic misma
CVE-2026-82736 2.1 LOW Ash.Type.CiString validates length and match constraints before case folding, allowing con
CVE-2026-82740 2.1 LOW Ash.Type ignores outer array constraints on nested {:array, {:array, type}} inputs
CVE-2026-82734 2.1 LOW Non-finite Infinity/NaN decimal values bypass bounds constraints in Ash.Type.Decimal
CVE-2026-82741 2.1 LOW Ash.Type.Union with :map_with_tag does not force the tag on dump, enabling tag confusion
CVE-2026-82743 2.1 LOW Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads
CVE-2026-82744 2.1 LOW Ash.Reactor change step fails open, skipping a change when its where guard raises

Showing top 20 of 22 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: ash
Same vendor: ash-project
Same weakness: CWE-284

V. Comments for CVE-2026-82745

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