CVE-2026-82736

Incorrect Behavior Order: Validate Before Canonicalize vulnerability in ash-project ash lets an attacker store a case-insensitive string value that violates its length or match constraints. Ash.Type.CiString.apply_constraints/2 (lib/ash/type/ci_string.ex) validated the max_length, min_length, and match constraints against the value as submitted, while the type case-folds the string (per its casing) for storage and comparison. Because validation ran before folding, an attacker can submit a value whose folded form breaks a constraint but whose original form passes: for example, against a match pattern requiring uppercase, an uppercase value that is stored lowercased persists a value the pattern rejects. The fix case-folds the value at the start of apply_constraints/2, so the constraints are checked against the form that is actually stored. This issue affects ash: from 1.29.0-rc0 before 3.32.2.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-82736.html
https://github.com/ash-project/ash/commit/d8320b0127c8ef453679d70e5dd23a9506951d21
https://github.com/ash-project/ash/security/advisories/GHSA-gg9w-7593-hxg9
https://osv.dev/vulnerability/EEF-CVE-2026-82736
https://github.com/ash-project/ash/security/advisories/GHSA-gg9w-7593-hxg9

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 04:18

Updated : 2026-09-01 21:15

NVD link : CVE-2026-82736

Mitre link : CVE-2026-82736

CVE.ORG link : CVE-2026-82736

JSON object : View

Products Affected

No product.

CWE

CWE-180

Incorrect Behavior Order: Validate Before Canonicalize

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Because validation ran before folding, an attacker can submit a value whose folded form breaks a constraint but whose original form passes: for example, against a match pattern requiring uppercase, an uppercase value that is stored lowercased persists a value the pattern rejects. The fix case-folds the value at the start of apply_constraints/2, so the constraints are checked against the form that is actually stored.\n\nThis issue affects ash: from 1.29.0-rc0 before 3.32.2."}], "lastModified": "2026-09-01T21:15:00.147", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}