5.9

CVE-2026-82747

Ash.Policy.Authorizer returns records denied by a runtime read policy to any actor

Incorrect Authorization vulnerability in ash-project ash returns records that a runtime read policy denies to any actor.

When a resource has an access_type :runtime read policy (a check evaluated per record rather than compiled to a filter), Ash.Policy.Authorizer decides each record in check_result/1 (lib/ash/policy/authorizer/authorizer.ex) by discarding impossible policy scenarios and inspecting what remains. When every scenario for a record was impossible, meaning no policy can authorize it and it must be forbidden, the empty-scenario branch instead kept the record ({[record | data], authorizer, any_forbidden?}) and returned it as authorized. As a result, records the runtime read policy denies are returned to any actor. The fix forbids a record whose scenarios are all impossible.

This issue affects ash: from 3.4.44 before 3.32.2.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
Herstellerash-project
≫
Produkt ash
Default Statusunaffected
Version 3.4.44
Version < 3.32.2
Status affected
Herstellerash-project
≫
Produkt ash
Default Statusunaffected
Version f4a8ff53fd3b974468d73685cd3fc842ef893de3
Version < 6eddb8ab26e45023faf0c79ebd152bb40aefda02
Status affected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
6b3ad84c-e1a6-4bf7-a703-f496b71e49db 5.9 0 0
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE-863 Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

https://github.com/ash-project/ash/security/advisories/GHSA-4259-gvr2-4xhq
https://cna.erlef.org/cves/CVE-2026-82747.html
https://osv.dev/vulnerability/EEF-CVE-2026-82747
https://github.com/ash-project/ash/commit/6eddb8ab26e45023faf0c79ebd152bb40aefda02