CVE-2026-41662

CVE-2026-41662 is a medium-severity vulnerability with a CVSS 3.x base score of 5.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-754.

Key facts

Description

Admidio is an open-source user management solution. Prior to version 5.0.9, Role::stopMembership() does not verify whether removing a user from the administrator role leaves zero administrators. The deprecated Membership::stopMembership() contains this safety check, but the current code path bypasses it. Any administrator can remove the last remaining other administrator, locking the entire system out of administrative access. The exploit does not require concurrent requests; sequential removals produce the same result. This issue has been patched in version 5.0.9.

Frequently asked questions

What is CVE-2026-41662?
Admidio is an open-source user management solution. Prior to version 5.0.9, Role::stopMembership() does not verify whether removing a user from the administrator role leaves zero administrators. The deprecated Membership::stopMembership() contains this safety check, but the current code path bypasses it. Any administrator can remove the last remaining other administrator, locking the entire system out of administrative access. The exploit does not require concurrent requests; sequential removals produce the same result. This issue has been patched in version 5.0.9.
How severe is CVE-2026-41662?
CVE-2026-41662 has a CVSS 3.x base score of 5.2, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is none, integrity low, and availability high.
Is CVE-2026-41662 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-41662?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41662 have an EU (EUVD) identifier?
Yes. CVE-2026-41662 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28276.
When was CVE-2026-41662 published?
CVE-2026-41662 was published on 2026-05-07 and last updated on 2026-06-17.

References

Other CWE-754 (Improper Check for Unusual or Exceptional Conditions) vulnerabilities

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