Description
Zipline before 4.6.5 contains a TOCTOU race condition in the POST /api/setup endpoint that allows unauthenticated attackers to create multiple SUPERADMIN accounts by racing concurrent requests before the firstSetup flag is reset. Attackers can send simultaneous requests with spoofed X-Forwarded-For headers during the argon2 hashing window to gain full administrative control of the instance.
Published: 2026-11-13
Score: 9.2 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 14 Nov 2026 01:15:00 +0000

Type Values Removed Values Added
First Time appeared Diced
Diced zipline
Vendors & Products Diced
Diced zipline

Fri, 13 Nov 2026 09:45:00 +0000

Type Values Removed Values Added
Description Zipline before 4.6.5 contains a TOCTOU race condition in the POST /api/setup endpoint that allows unauthenticated attackers to create multiple SUPERADMIN accounts by racing concurrent requests before the firstSetup flag is reset. Attackers can send simultaneous requests with spoofed X-Forwarded-For headers during the argon2 hashing window to gain full administrative control of the instance.
Title Zipline before 4.6.5 TOCTOU Race Condition via /api/setup
Weaknesses CWE-367
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-13T15:59:25.102Z

Reserved: 2026-11-11T22:56:41.844Z

Link: CVE-2026-126937

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-13T10:18:00.417

Modified: 2026-11-13T16:18:47.620

Link: CVE-2026-126937

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-14T01:00:09Z

Weaknesses