CVE-2026-126952

HIGH 8.1

Zipline through 4.4.0 WebAuthn Authentication Bypass via Passkey Login

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-347
Vendor	diced
Product	zipline
Published	Nov 13, 2026

Stay Ahead of the Next One

Get instant alerts for diced zipline

Be the first to know when new high vulnerabilities affecting diced zipline are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

diced / zipline

0 ≤ 4.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/diced/zipline/security/advisories/GHSA-8g3f-425r-35rq vulncheck.com: https://www.vulncheck.com/advisories/zipline-through-4.4.0-webauthn-authentication-bypass-via-passkey-login

Credits

🔍 nojomyth-dev