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Vulnerability details: VCID-sswc-d2f8-zyc9
Vulnerability ID VCID-sswc-d2f8-zyc9
Aliases CVE-2026-41128
GHSA-jq2f-59pj-p3m3
Summary 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.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-862 Missing Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00041 https://api.first.org/data/v1/epss?cve=CVE-2026-41128
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-jq2f-59pj-p3m3
cvssv4 5.3 https://github.com/craftcms/cms
generic_textual MODERATE https://github.com/craftcms/cms
cvssv4 5.3 https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
generic_textual MODERATE https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
ssvc Track https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
cvssv3.1_qr MODERATE https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
cvssv4 5.3 https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
generic_textual MODERATE https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
ssvc Track https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
cvssv4 5.3 https://nvd.nist.gov/vuln/detail/CVE-2026-41128
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-41128
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-41128
https://nvd.nist.gov/vuln/detail/CVE-2026-41128
b135384808ad43fcf8836a9dd9b877fb0087bc27 https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
GHSA-jq2f-59pj-p3m3 https://github.com/advisories/GHSA-jq2f-59pj-p3m3
GHSA-jq2f-59pj-p3m3 https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/craftcms/cms
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-22T18:13:25Z/ Found at https://github.com/craftcms/cms/commit/b135384808ad43fcf8836a9dd9b877fb0087bc27
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

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present

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passive

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-04-22T18:13:25Z/ Found at https://github.com/craftcms/cms/security/advisories/GHSA-jq2f-59pj-p3m3
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-41128
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

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none

passive

active

high

low

none

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Exploit Prediction Scoring System (EPSS)
Percentile 0.12684
EPSS Score 0.00041
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:51:21.007516+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/41xxx/CVE-2026-41128.json 38.6.0