{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52891", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-08T21:44:27.365Z", "datePublished": "2026-07-15T21:08:02.223Z", "dateUpdated": "2026-07-15T21:08:02.223Z"}, "containers": {"cna": {"title": "Wekan: Shell Injection via Avatar Upload", "problemTypes": [{"descriptions": [{"cweId": "CWE-78", "lang": "en", "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-88", "lang": "en", "description": "CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.9, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/wekan/wekan/security/advisories/GHSA-35j7-h385-2q9g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/wekan/wekan/security/advisories/GHSA-35j7-h385-2q9g"}, {"name": "https://github.com/wekan/wekan/commit/a4c74a5980e9f778eb444fd346f32aa3d16786a9", "tags": ["x_refsource_MISC"], "url": "https://github.com/wekan/wekan/commit/a4c74a5980e9f778eb444fd346f32aa3d16786a9"}, {"name": "https://github.com/wekan/wekan/releases/tag/v9.07", "tags": ["x_refsource_MISC"], "url": "https://github.com/wekan/wekan/releases/tag/v9.07"}], "affected": [{"vendor": "wekan", "product": "wekan", "versions": [{"version": "< 9.07", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-15T21:08:02.223Z"}, "descriptions": [{"lang": "en", "value": "Wekan is open source kanban built with Meteor. Prior to 9.07, Wekan avatar upload functionality embeds user-supplied filenames into paths later passed to child_process.exec() for MIME-type detection. Because models/avatars.js and models/fileValidation.js used a shell command with the avatar filename, shell metacharacters such as backticks and $() in the filename could execute commands on the server. This issue is fixed in version 9.07."}], "source": {"advisory": "GHSA-35j7-h385-2q9g", "discovery": "UNKNOWN"}}}}

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