{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-4916", "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "state": "PUBLISHED", "assignerShortName": "GitLab", "dateReserved": "2026-03-26T17:33:30.367Z", "datePublished": "2026-04-08T22:25:22.837Z", "dateUpdated": "2026-04-08T22:25:22.837Z"}, "containers": {"cna": {"title": "Missing Authorization in GitLab", "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations."}], "affected": [{"vendor": "GitLab", "product": "GitLab", "repo": "git://git@gitlab.com:gitlab-org/gitlab.git", "cpes": ["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"], "versions": [{"version": "18.2", "status": "affected", "lessThan": "18.8.9", "versionType": "semver"}, {"version": "18.9", "status": "affected", "lessThan": "18.9.5", "versionType": "semver"}, {"version": "18.10", "status": "affected", "lessThan": "18.10.3", "versionType": "semver"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-862: Missing Authorization", "cweId": "CWE-862", "type": "CWE"}]}], "references": [{"url": "https://hackerone.com/reports/3301240", "name": "HackerOne Bug Bounty Report #3301240", "tags": ["technical-description", "exploit", "permissions-required"]}, {"url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/565414"}, {"url": "https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseScore": 2.7, "baseSeverity": "LOW"}}], "solutions": [{"lang": "en", "value": "Upgrade to versions 18.8.9, 18.9.5, 18.10.3 or above."}], "credits": [{"lang": "en", "value": "Thanks [theluci](https://hackerone.com/theluci) for reporting this vulnerability through our HackerOne bug bounty program", "type": "finder"}], "providerMetadata": {"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "shortName": "GitLab", "dateUpdated": "2026-04-08T22:25:22.837Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that could have allowed an authenticated user with custom role permissions to demote or remove higher-privileged group members due to improper authorization checks on member management operations."}], "id": "CVE-2026-4916", "lastModified": "2026-04-08T23:17:00.053", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 2.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 1.4, "source": "cve@gitlab.com", "type": "Secondary"}]}, "published": "2026-04-08T23:17:00.053", "references": [{"source": "cve@gitlab.com", "url": "https://about.gitlab.com/releases/2026/04/08/patch-release-gitlab-18-10-3-released/"}, {"source": "cve@gitlab.com", "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/565414"}, {"source": "cve@gitlab.com", "url": "https://hackerone.com/reports/3301240"}], "sourceIdentifier": "cve@gitlab.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "cve@gitlab.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[18.2,18.8.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[18.9,18.9.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[18.10,18.10.3)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "GitLab", "source": "cna", "vendor": "GitLab"}, "product": "gitlab", "vendor": "gitlab"}], "analysis": {"en": {"generated_at": "2026-04-08T23:52:07.692921+00:00", "value": {"mitigation_remediation": ["Apply the vendor\u2011recommended patch to GitLab 18.8.9, 18.9.5, 18.10.3 or newer", "Verify that the patch applied successfully and that member management privileges are enforced correctly", "Review any custom role configurations to ensure they do not grant unintended member\u2011management rights"], "summary": {"action": "Immediate Patch", "impact": "Unauthorized Privilege Escalation"}, "threat_synthesis": {"affected_systems": "All GitLab Community Edition and Enterprise Edition releases from version 18.2 up to but not including 18.8.9, from 18.9 up to but not including 18.9.5, and from 18.10 up to but not including 18.10.3 are affected. The issue is specific to these GitLab deployments and does not apply to later patched releases.", "description_and_impact": "GitLab contains an improper authorization check in the member management API that allows an authenticated user with a custom role granting member\u2011management permissions to demote or remove higher\u2011privileged group members. The flaw does not provide code execution or direct data access; it solely permits unauthorized modification of user privileges within a group, effectively enabling privilege escalation or weakening of existing access controls.", "risk_and_exploitability": "The CVSS score of 2.7 indicates low severity. No publicly reported exploitation activity has been documented, and the vulnerability is not included in the CISA Known Exploited Vulnerabilities catalog. Exploitation requires authentication and possession of a custom role with member\u2011management permissions, which may be available to insiders or compromised accounts. While the attack path is straightforward for a user with the necessary permissions, the overall risk remains limited compared to higher\u2011impact vulnerabilities."}}}}, "created": "2026-04-09T08:16:15.588818+00:00", "updated": "2026-04-09T08:25:41.532519+00:00", "vendors": ["gitlab", "gitlab$PRODUCT$gitlab"]}