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TI-2026-57064 Aliases CVE-2026-82746

Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to forbidden records

Priority MEDIUM 60CWE-862Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Missing Authorization vulnerability in ash-project ash allows an actor to update records forbidden by resource policies through the atomic path of Ash.update_many/4. Ash.update_many/4 runs as a single atomic statement (a data-layer update_many, for example a SQL MERGE) whenever an atomic strategy is used and the data layer supports it. Ash.Actions.Update.UpdateMany (lib/ash/actions/update/update_many.ex) took that path even under authorize?: true without applying the resource's policies, so the statement updated every row matched by primary key regardless of the policy filter that authorization would impose. An actor could therefore update records the policies forbid, such as rows belonging to another actor or tenant. The fix restricts the atomic path to data layers supporting changeset filters when authorizing, authorizes each changeset, and merges the resulting policy filter into each changeset so the statement only touches authorized rows. This issue affects ash: from 3.29.0 before 3.32.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00171 6th percentileScored 2026-11-07
Fix Fixed ash (ash-project): 3.32.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ash-projectash3.29.0 to before 3.32.23.32.2Patch availableCNA
  • ash Vendorash-project Affected 3.29.0 to before 3.32.2 Fixed in 3.32.2 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

  • Fix · CNA ash (ash-project) Fixed in 3.32.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ash-project ash 3.32.2

    16 records Highest priority Priority MEDIUM 15 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-57067 Incorrect authorization in ash-project ashPriority MEDIUM 60
    • TI-2026-57065 Ash.Policy.Authorizer returns records denied by a runtime read policy to any actorPriority MEDIUM 60
    • TI-2026-57063 ETS and Mnesia data layers overwrite an existing record on create instead of enforcing primary-key uniquenessPriority MEDIUM 60
    Show all 16 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82746

References

Patch 1

Advisory 1

Other 2

  • TI-2026-56298 Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service CVSS 4.0HIGH 8.7
  • TI-2026-52572 Unbounded atom creation from client-supplied RPC field names in AshTypescript field formatter CVSS 4.0HIGH 8.7
  • TI-2026-57010 Path traversal in AshAdmin file uploads via unsanitized client filename CVSS 4.0HIGH 8.3
  • TI-2026-26840 Ash Framework: Ash.Type.Module.cast_input/2 atom exhaustion via unchecked Module.concat allows BEAM VM crash CVSS 4.0HIGH 8.2
  • TI-2026-54252 EEx template evaluation of prompt content in AshAi enables remote code execution CVSS 4.0HIGH 8.9
  • TI-2026-54208 Stored XSS in AshAdmin relationship typeahead via unescaped label_field content CVSS 4.0HIGH 8.4
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences