TI-2026-57052 Aliases CVE-2026-82734

Non-finite Infinity/NaN decimal values bypass bounds constraints in Ash.Type.Decimal

MEDIUM 44CWE-1284Published 2026-09-01 · Updated 2026-09-01

Key facts

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

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

Summary

Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to submit a non-finite decimal value that bypasses numeric bounds constraints or fails later operations on the value. Ash.Type.Decimal cast input through Ecto's decimal cast in cast_input/2 and cast_stored/2 (lib/ash/type/decimal.ex) without checking that the resulting value is finite. Elixir's Decimal represents Infinity and NaN as valid structs, so a value such as "Infinity" or "NaN" passed casting and was persisted. Because NaN compares as false against every bound, min and max constraints do not reject it, and the stored special value later raises when used in Decimal arithmetic or is refused by the data layer, failing subsequent requests. The fix rejects any non-finite Decimal during casting. This issue affects ash: from 1.28.0 before 3.32.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00189 8th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
ash-project	ash	1.28.0 to before 3.32.2	3.32.2	Patch available	CNA

ash Vendorash-project Affected 1.28.0 to before 3.32.2 Fixed in 3.32.2 Patch available CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
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 · 2026-09-01
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

2026-10-02 Threatist record created from CVE-2026-82734

References

Patch 1

https://github.com/ash-project/ash/commit/818087b1b3364f2af6f5460d6b01262ad0f69204

Advisory 1

https://github.com/ash-project/ash/security/advisories/GHSA-mvvh-q33h-q62v

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

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