by Kastro
Paper/Archive/CVE-2026-126937

CVE-2026-126937

diced zipline — Zipline before 4.6.5 TOCTOU Race Condition via /api/setup

CVSS 9.2
critical.is priorityof 100
28
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
zipline< 4.6.54.6.5CNA

Scores by source

VulnCheck (CNA)9.2CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
VulnCheck (CNA)8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

advisorygithub.com/diced/zipline/security/advisories/GHSA-wgjv-p9mm-qw77writeupvulncheck.com/advisories/zipline-before-4.6.5-toctou-race-condition-via-api-setup