CVE-2026-28510Network attack vector

Account access via request-controlled MFA secret

Published May 5, 2026 · Updated May 5, 2026

Authentication bypass in eLabFTW 5.4.1 allows remote authenticated users to access accounts without the configured additional factor. LoginController's MFA branch constructed MfaHelper with the session secret or, when absent, the request's mfa_secret value, allowing validation against an attacker-supplied secret. Valid primary credentials and the affected login state are required; exploitation grants the target account's data access and modification privileges without interrupting the service.

CVSS severity5.9
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in eLabFTW 5.4.1 allows remote authenticated users to access accounts without the configured additional factor. LoginController's MFA branch constructed MfaHelper with the session secret or, when absent, the request's mfa_secret value, allowing validation against an attacker-supplied secret. Valid primary credentials and the affected login state are required; exploitation grants the target account's data access and modification privileges without interrupting the service.

The record

CVE
CVE-2026-28510
Published
May 5, 2026
Updated
May 5, 2026
Vendor
Deltablot
Product
eLabFTW
Classifications
CWE-302, T1078
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2026CVE publishedPublication date reported by the CVE source.
  2. May 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion== 5.4.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Deltablot · eLabFTWversion== 5.4.1

Published CVSS scores

5.9GitHubCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-302Authentication Bypass by Assumed-Immutable Data
T1078Valid Accounts

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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