Is This vulnerability exploited in the wild?

No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

How severe is This vulnerability?

Medium severity, with a CVSS score of 6.5, published 18 May 2026.

Is there a fix for This vulnerability?

A patch was published on 2026-05-18: Fixed in version 2.9.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is This vulnerability attacked?

It is attacked over the network, in a software library.

Check whether you run edumfa (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

eduMFA denial of service via failcounter increment in /validate/check

Severity: medium · CVSS 6.5 · Published 2026-05-18

eduMFA is a multi-factor authentication (MFA) solution used to secure user logins. A flaw in the system allows an attacker to trigger a 'failed login' count for every user within a specific group simultaneously. If exploited, this could lead to a widespread lockout of legitimate users, causing a significant disruption to business operations and services.

Technologies: edumfa (PyPI). Vendors: PyPI.

Quick answers

Is This vulnerability exploited in the wild?: No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.
How severe is This vulnerability?: Medium severity, with a CVSS score of 6.5, published 18 May 2026.
Which products and versions are affected?: edumfa (PyPI) < 2.9.1.
Is there a fix for This vulnerability?: A patch was published on 2026-05-18: Fixed in version 2.9.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is This vulnerability attacked?: It is attacked over the network, in a software library.
Am I affected?: Check whether you run edumfa (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A vulnerability in the `/validate/check` endpoint of eduMFA exists due to improper input validation (CWE-20). When a request includes a valid 'resolver' parameter but specifies a non-existent user, the application incorrectly increments the failcounters for all tokens associated with that resolver. An attacker with network access and low privileges can exploit this behavior to reach the maximum failure threshold for all users in a resolver, effectively locking them out of the system. This issue is resolved in version 2.9.1. Workarounds include restricting access to the validation endpoint using API keys or reverse proxy rules.

Affected products

eduMFA eduMFA < 2.9.1

Timeline

2026-05-11: disclosed
2026-05-18: advisory
2026-05-18: patched: Fixed in version 2.9.1

References

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