by Kastro
Paper/Archive/CVE-2026-126952

CVE-2026-126952

diced zipline — Zipline through 4.4.0 WebAuthn Authentication Bypass via Passkey Login

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 through 4.4.0 contains an authentication bypass vulnerability in the WebAuthn login endpoint that creates sessions for a supplied registered credential ID without verifying the assertion. Attackers who obtain a target's passkey credential ID can impersonate that account without its authenticator, potentially gaining administrative control over SUPERADMIN accounts.

Affected

ProductAffectedFixed inSource
zipline≤ 4.4.0–CNA

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-8g3f-425r-35rqwriteupvulncheck.com/advisories/zipline-through-4.4.0-webauthn-authentication-bypass-via-passkey-login