{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-28741", "assignerOrgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "state": "PUBLISHED", "assignerShortName": "Mattermost", "dateReserved": "2026-03-10T13:45:39.984Z", "datePublished": "2026-04-15T10:13:33.950Z", "dateUpdated": "2026-04-15T10:13:33.950Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unaffected", "product": "Mattermost", "vendor": "Mattermost", "versions": [{"lessThanOrEqual": "10.11.12", "status": "affected", "version": "10.11.0", "versionType": "semver"}, {"lessThanOrEqual": "11.5.0", "status": "affected", "version": "11.5.0", "versionType": "semver"}, {"lessThanOrEqual": "11.4.2", "status": "affected", "version": "11.4.0", "versionType": "semver"}, {"lessThanOrEqual": "11.3.2", "status": "affected", "version": "11.3.0", "versionType": "semver"}, {"version": "10.11.13", "status": "unaffected"}, {"version": "11.5.1", "status": "unaffected"}, {"version": "11.4.3", "status": "unaffected"}, {"version": "11.3.3", "status": "unaffected"}]}], "credits": [{"lang": "en", "type": "finder", "value": "Eva Sarafianou"}], "descriptions": [{"lang": "en", "value": "Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625"}], "metrics": [{"cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE", "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N", "baseSeverity": "MEDIUM", "baseScore": 6.8}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-352: Cross-Site Request Forgery (CSRF)", "cweId": "CWE-352"}]}], "references": [{"url": "https://mattermost.com/security-updates", "name": "MMSA-2026-00625", "tags": ["vendor-advisory"]}], "solutions": [{"value": "Update Mattermost to versions 10.11.13, 11.5.1, 11.4.3, 11.3.3 or higher.", "lang": "en"}], "source": {"advisory": "MMSA-2026-00625", "defect": ["https://mattermost.atlassian.net/browse/MM-67789"], "discovery": "EXTERNAL"}, "title": "CSRF Protection Bypass Allows Updating a User's Authentication Method", "providerMetadata": {"orgId": "9302f53e-dde5-4bf3-b2f2-a83f91ac0eee", "shortName": "Mattermost", "dateUpdated": "2026-04-15T10:13:33.950Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[10.11.0,10.11.12]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "11.5.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[11.4.0,11.4.2]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[11.3.0,11.3.2]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "10.11.13"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "11.5.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "11.4.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "11.3.3"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Mattermost", "source": "cna", "vendor": "Mattermost"}, "product": "mattermost", "vendor": "mattermost"}], "created": "2026-04-15T13:44:47.516782+00:00", "updated": "2026-04-15T13:44:47.516868+00:00", "vendors": ["mattermost", "mattermost$PRODUCT$mattermost"]}