How severe is CVE-2026-41891?

CVE-2026-41891 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2026-41891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-41891?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-41891 have an EU (EUVD) identifier?

Yes. CVE-2026-41891 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28294.

When was CVE-2026-41891 published?

CVE-2026-41891 was published on 2026-05-07 and last updated on 2026-06-17.

CVE-2026-41891

CVE-2026-41891 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.3. 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-613.

Key facts

Severity: Medium (CVSS 4.0 base score 5.3)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28294
Weakness: CWE-613
Published: 2026-05-07
Last modified: 2026-06-17

Description

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version 0.31.8.0.

Frequently asked questions

What is CVE-2026-41891?: CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0 to before version 0.31.8.0, the auth filter has the deactivated/banned user check commented out. This issue has been patched in version 0.31.8.0.
How severe is CVE-2026-41891?: CVE-2026-41891 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2026-41891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-41891?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41891 have an EU (EUVD) identifier?: Yes. CVE-2026-41891 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28294.
When was CVE-2026-41891 published?: CVE-2026-41891 was published on 2026-05-07 and last updated on 2026-06-17.

References

Other CWE-613 (Insufficient Session Expiration) vulnerabilities

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