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TI-2026-57056 Aliases CVE-2026-82738

Ash.Type.UUIDv7 accepts non-v7 UUIDs that then fail to load, causing persistent denial of service

Priority MEDIUM 60CWE-20Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Improper Input Validation vulnerability in ash-project ash allows an attacker to persistently deny reads of a record by storing a non-version-7 UUID in an Ash.Type.UUIDv7 attribute. Ash.Type.UUIDv7.cast_input/2 accepts any well-formed UUID string, including non-version-7 UUIDs, and stores it as a 16-byte binary. On read, cast_stored/2 (lib/ash/type/uuid_v7.ex) routes the stored binary back through cast_input/2, which since an input-validation tightening in v3.6.3 matches only version-7 (and optionally version-4) 16-byte binaries and otherwise expects a 36-character string. A stored non-v7 16-byte binary matches neither clause and returns :error, so every later read of that record fails. An attacker able to set such an attribute poisons the row permanently. The fix decodes any 16-byte stored binary directly in cast_stored/2. This issue affects ash: from 3.6.3 before 3.32.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0018 7th 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-projectash3.6.3 to before 3.32.23.32.2Patch availableCNA
  • ash Vendorash-project Affected 3.6.3 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-2026-57064 Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to forbidden recordsPriority MEDIUM 60
    Show all 16 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-82738

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