CVE-2026-104970

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Source
https://cve.org/CVERecord?id=CVE-2026-104970
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104970.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-104970
Aliases
  • GHSA-p548-28jp-wr4p
Published
2026-10-05T16:58:55Z
Modified
2026-10-06T02:45:42Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
Plane: InstanceAdminSignUpEndpoint TOCTOU race allows two concurrent unauthenticated callers to both bootstrap as Plane instance admins
Details

Plane is an open-source project management tool. From 0.13 until 1.4.0, InstanceAdminSignUpEndpoint in apps/api/plane/license/api/views/admin.py:89-117, 173-229 uses InstanceAdmin.objects.first() for the first-admin check and performs account creation without an atomic transaction, row lock, uniqueness guard, or advisory lock. Two concurrent unauthenticated requests with different email addresses can both observe that no instance administrator exists, create separate User and InstanceAdmin rows, and receive sessions with instance-admin authority. This allows an attacker to share unrestricted instance administration with the legitimate operator. This issue is fixed in 1.4.0.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-362"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104970.json"
}
References

Affected packages

Git / github.com/makeplane/plane

Affected ranges

Type
GIT
Repo
https://github.com/makeplane/plane
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
917b23a6c16d93fc00cef67900eff2755e8b13f7
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.4.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v0.*
v0.1-dev
v0.10-dev
v0.11-dev
v0.12-dev
v0.12.1-dev
v0.12.2-dev
v0.13-dev
v0.13.1-dev
v0.13.2-dev
v0.14-dev
v0.14.1-dev
v0.14.2-dev
v0.15-dev
v0.15.1-dev
v0.15.2-dev
v0.15.3-hotfix
v0.15.4-dev
v0.16-dev
v0.17-dev
v0.18-dev
v0.19-dev
v0.20-dev
v0.21-dev
v0.22-dev
v0.23.0
v0.23.1
v0.24.0
v0.3.1-dev
v0.4-dev
v0.5-dev
v0.6-dev
v0.7-dev
v0.7.1-dev
v0.8-dev
v0.9-dev
v1.*
v1.3.0
v1.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-104970.json"