{
    "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": "2026-07-17T18:23:51.039Z"
    },
    "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"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-07-17T18:23:06.206379Z",
                                "id": "CVE-2026-52891",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-07-17T18:23:51.039Z"
                }
            }
        ]
    }
}