CVE-2026-52891

{"id": "CVE-2026-52891", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-52891", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-07-17T18:23:06.206379Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "wekan", "product": "wekan", "versions": [{"status": "affected", "version": "< 9.07"}]}]}], "published": "2026-07-15T22:17:16.450", "references": [{"url": "https://github.com/wekan/wekan/commit/a4c74a5980e9f778eb444fd346f32aa3d16786a9", "source": "security-advisories@github.com"}, {"url": "https://github.com/wekan/wekan/releases/tag/v9.07", "source": "security-advisories@github.com"}, {"url": "https://github.com/wekan/wekan/security/advisories/GHSA-35j7-h385-2q9g", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-88"}]}], "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."}], "lastModified": "2026-07-17T19:17:16.647", "sourceIdentifier": "security-advisories@github.com"}