CVE-2026-28510: elabftw allows MFA bypass during login

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-05 · updated 2026-06-17
Weakness: CWE-302

Description

eLabFTW is an open source electronic lab notebook. In elabftw versions through 5.4.1, the login flow did not reliably preserve the multi-factor authentication state across authentication steps. Under certain conditions, an attacker with valid primary credentials could complete authentication with an attacker-controlled TOTP secret and bypass the additional factor. This could result in unauthorized account access. This issue is fixed in version 5.4.2.

Affected products

elabftw: before 5.4.2 — fixed in 5.4.2

How to fix

Upgrade to a fixed version: elabftw 5.4.2. Check the vendor advisory for mitigations.

References

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