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OpenAdvisories
High · 8.1 CVE-2026-126937 EUVD-2026-125128GHSA-jc78-2hw2-8h3g

Zipline before 4.6.5 TOCTOU Race Condition via /api/setup

Published Nov 13, 2026 · Updated Nov 13, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
diced zipline < 4.6.5 4.6.5

References