How severe is CVE-2026-41128?

CVE-2026-41128 has a CVSS 4.0 base score of 5.3, rated medium severity.

Is CVE-2026-41128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-41128?

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

Does CVE-2026-41128 have an EU (EUVD) identifier?

Yes. CVE-2026-41128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24567.

When was CVE-2026-41128 published?

CVE-2026-41128 was published on 2026-04-22 and last updated on 2026-06-17.

CVE-2026-41128

CVE-2026-41128 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-862.

Key facts

Severity: Medium (CVSS 4.0 base score 5.3)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-24567
Weakness: CWE-862
Published: 2026-04-22
Last modified: 2026-06-17

Description

Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch.

Frequently asked questions

What is CVE-2026-41128?: Craft CMS is a content management system (CMS). In versions 5.6.0 through 5.9.14, the `actionSavePermissions()` endpoint allows a user with only `viewUsers` permission to remove arbitrary users from all user groups. While `_saveUserGroups()` enforces per-group authorization for additions, it performs no equivalent authorization check for removals, so submitting an empty `groups` value removes all existing group memberships. Version 5.9.15 contains a patch.
How severe is CVE-2026-41128?: CVE-2026-41128 has a CVSS 4.0 base score of 5.3, rated medium severity.
Is CVE-2026-41128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-41128?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-41128 have an EU (EUVD) identifier?: Yes. CVE-2026-41128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-24567.
When was CVE-2026-41128 published?: CVE-2026-41128 was published on 2026-04-22 and last updated on 2026-06-17.

References

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