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    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-9053",
        "assignerOrgId": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9",
        "state": "PUBLISHED",
        "assignerShortName": "9front",
        "dateReserved": "2026-05-19T21:39:13.119Z",
        "datePublished": "2026-05-22T02:57:35.162Z",
        "dateUpdated": "2026-05-22T12:36:11.446Z"
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    "containers": {
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                "orgId": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9",
                "shortName": "9front",
                "dateUpdated": "2026-05-22T02:57:35.162Z"
            },
            "affected": [
                {
                    "vendor": "9front",
                    "product": "9front",
                    "platforms": [
                        "x86",
                        "32 bit",
                        "64 bit"
                    ],
                    "packageName": "mothra",
                    "repo": "https://git.9front.org/plan9front/9front/HEAD/info.html",
                    "modules": [
                        "mothra"
                    ],
                    "programFiles": [
                        "/sys/src/cmd/mothra/forms.c"
                    ],
                    "programRoutines": [
                        {
                            "name": "rdform()"
                        }
                    ],
                    "versions": [
                        {
                            "status": "affected",
                            "version": "f04e113279274526a8dae34de373027b68921fbf",
                            "lessThan": "d145acc9ef0da47131af6ad94e87264e04870d47",
                            "versionType": "git"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element.",
                    "supportingMedia": [
                        {
                            "type": "text/html",
                            "base64": false,
                            "value": "Mothra would respect a default value given by a website for HTML file upload forms. An attacker could craft a website with a malicious default file path, and then conceal this form element."
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html",
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                        "mitigation"
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                }
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                            "lang": "en",
                            "value": "GENERAL"
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                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "ACTIVE",
                        "vulnConfidentialityImpact": "HIGH",
                        "subConfidentialityImpact": "HIGH",
                        "vulnIntegrityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subAvailabilityImpact": "NONE",
                        "exploitMaturity": "PROOF_OF_CONCEPT",
                        "Safety": "NOT_DEFINED",
                        "Automatable": "NO",
                        "Recovery": "AUTOMATIC",
                        "valueDensity": "NOT_DEFINED",
                        "vulnerabilityResponseEffort": "LOW",
                        "providerUrgency": "AMBER",
                        "version": "4.0",
                        "baseSeverity": "MEDIUM",
                        "baseScore": 6.9,
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:P/AU:N/R:A/RE:L/U:Amber"
                    }
                }
            ],
            "timeline": [
                {
                    "time": "2026-05-10T18:00:00.000Z",
                    "lang": "en",
                    "value": "Initial private disclosure"
                },
                {
                    "time": "2026-05-11T18:18:00.000Z",
                    "lang": "en",
                    "value": "Fix committed"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Kristo",
                    "type": "finder"
                },
                {
                    "lang": "en",
                    "value": "Kristo",
                    "type": "reporter"
                },
                {
                    "lang": "en",
                    "value": "Jacob Moody",
                    "type": "coordinator"
                },
                {
                    "lang": "en",
                    "value": "Kristo",
                    "type": "remediation developer"
                },
                {
                    "lang": "en",
                    "value": "cinap_lenrek",
                    "type": "remediation developer"
                }
            ],
            "source": {
                "discovery": "UNKNOWN"
            },
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        },
        "adp": [
            {
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "type": "CWE",
                                "cweId": "CWE-434",
                                "lang": "en",
                                "description": "CWE-434 Unrestricted Upload of File with Dangerous Type"
                            }
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-05-22T12:35:42.430223Z",
                                "id": "CVE-2026-9053",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-05-22T12:36:11.446Z"
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}