Low severity · published Sep 1, 2026
CVE-2026-82734
Non-finite Infinity/NaN decimal values bypass bounds constraints in Ash.Type.Decimal
2.1
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
ash · ash-project
1.28.0 before 3.32.2; db6bdfcf1518c70d67975efb140cdeb2cb6a76e7 before 818087b1b3364f2af6f5460d6b01262ad0f69204 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82734
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82734
cna.erlef.org
https://cna.erlef.org/cves/CVE-2026-82734.html
github.com
https://github.com/ash-project/ash/commit/818087b1b3364f2af6f5460d6b01262ad0f69204
github.com
https://github.com/ash-project/ash/security/advisories/GHSA-mvvh-q33h-q62v
osv.dev
https://osv.dev/vulnerability/EEF-CVE-2026-82734
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