CVE-2026-82724

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Source
https://cve.org/CVERecord?id=CVE-2026-82724
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82724.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-82724
Aliases
Published
2026-08-31T03:07:57Z
Modified
2026-09-03T03:30:55Z
Severity
  • 7.6 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Broken access control in AshPhoenix SubdomainHook via a nil tenant in handle_subdomain
Details

Incorrect Authorization vulnerability in ash-project ash_phoenix invokes the SubdomainHook authorization callback with a nil tenant, so tenant-scoped access checks never see the tenant they are meant to enforce.

AshPhoenix.LiveView.SubdomainHook.on_mount/4 attached a handle_params hook to assign the tenant and then immediately called handle_subdomain in the same on_mount. The tenant assign is only written when LiveView later runs handle_params, strictly after on_mount returns, so handle_subdomain read an unset assign and ran as apply(m, f, [socket, nil | a]). A consumer gate that halts when the user does not belong to the tenant instead evaluated nil, either crashing or taking a permissive branch, and it was never re-run once the real subdomain was assigned or on later navigations. The fix runs handle_subdomain inside the handle_params hook with the real tenant on every navigation.

This issue affects ash_phoenix: from 2.1.26 before 2.3.25.

Database specific 
{
    "cna_assigner": "EEF",
    "cwe_ids": [
        "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82724.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "9a5ea4d377bc263de321d79574872a3dfc4fb541"
                },
                {
                    "fixed": "b396e1aa5c6bdec39255f19cf938b539e6d28b71"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/ash-project/ash_phoenix

Affected ranges

Type
GIT
Repo
https://github.com/ash-project/ash_phoenix
Events
Introduced
02277a84d03fb43bdcbbb63dd97f9f1727509d8f
Fixed
1e38e7dc8838426cc94656238d9208759c661c03
Fixed
b396e1aa5c6bdec39255f19cf938b539e6d28b71
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "2.1.26"
        },
        {
            "fixed": "2.3.25"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

v2.*
v2.1.26
v2.2.0
v2.3.0
v2.3.1
v2.3.10
v2.3.11
v2.3.12
v2.3.13
v2.3.14
v2.3.15
v2.3.16
v2.3.17
v2.3.18
v2.3.19
v2.3.2
v2.3.20
v2.3.21
v2.3.22
v2.3.23
v2.3.24
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v2.3.7
v2.3.8
v2.3.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-82724.json"