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CVE-2026-82734— Non-finite Infinity/NaN decimal values bypass bounds constraints in Ash.Type.Decimal

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.

以下是该漏洞描述的中文翻译： 输入中指定数量校验不当 ash-project 中的 ash 库存在“输入中指定数量校验不当”的漏洞。攻击者可以提交一个非有限的小数（Decimal）值，从而绕过数值边界约束，或者导致后续对该值的操作失败。 详细分析： 通过 Ecto 的小数类型转换函数 和 （位于 ）对输入进行转换，但在转换后未检查生成的数值是否为有限值。由于 Elixir 的 Decimal 类型将“无穷大”（Infinity）和“非数值”（NaN）视为有效的结构体，因此诸如 或 这样的值在通过转换检查后被持久化存

CVSS 2.1 · Low
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I. Basic Information for CVE-2026-82734

Vulnerability Information
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Vulnerability Title
Non-finite Infinity/NaN decimal values bypass bounds constraints in Ash.Type.Decimal
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1284
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ash-project ash 1.28.0 ~ 3.32.2 cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*
ash-project ash db6bdfcf1518c70d67975efb140cdeb2cb6a76e7 ~ 818087b1b3364f2af6f5460d6b01262ad0f69204 cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-82734

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III. Intelligence Information for CVE-2026-82734

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Other References for CVE-2026-82734 (4)

Same Patch Batch · ash-project · 2026-09-01 · 23 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-2026-82738 5.9 MEDIUM Ash.Type.UUIDv7 accepts non-v7 UUIDs that then fail to load, causing persistent denial of
CVE-2026-82735 5.9 MEDIUM Match regex runs on over-length input in Ash.Type.String, enabling regex denial of service
CVE-2026-82737 5.9 MEDIUM Ash.Vector wraps the 16-bit dimension header for vectors over 65,535 elements, corrupting
CVE-2026-82747 5.9 MEDIUM Ash.Policy.Authorizer returns records denied by a runtime read policy to any actor
CVE-2026-82742 5.9 MEDIUM Ash.Filter.Runtime materializes a combinatorial cross-product over to-many relationships,
CVE-2026-82745 5.9 MEDIUM ETS and Mnesia data layers overwrite an existing record on create instead of enforcing pri
CVE-2026-82746 5.9 MEDIUM Ash.update_many/4 atomic path skips resource policy authorization, allowing updates to for
CVE-2026-82749 5.9 MEDIUM Ash relationship parent(...) filter degrades to an IS NULL match when the parent field is
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-2026-82740 2.1 LOW Ash.Type ignores outer array constraints on nested {:array, {:array, type}} inputs
CVE-2026-82741 2.1 LOW Ash.Type.Union with :map_with_tag does not force the tag on dump, enabling tag confusion
CVE-2026-82736 2.1 LOW Ash.Type.CiString validates length and match constraints before case folding, allowing con
CVE-2026-82743 2.1 LOW Ash.Actions.Read.AsyncLimiter busy-spins a scheduler while awaiting slow async reads

Showing top 20 of 23 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: ash
Same vendor: ash-project
Same weakness: CWE-1284

V. Comments for CVE-2026-82734

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