{"dataType": "CVE_RECORD", "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": "2026-05-22T02:57:35.162Z"}, "containers": {"cna": {"providerMetadata": {"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", "tags": ["mitigation"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "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"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-9053", "lastModified": "2026-05-22T04:16:28.430", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NO", "Recovery": "AUTOMATIC", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "AMBER", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:X/RE:L/U:Amber", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "LOW"}, "source": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9", "type": "Secondary"}]}, "published": "2026-05-22T04:16:28.430", "references": [{"source": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9", "url": "https://git.9front.org/plan9front/9front/d145acc9ef0da47131af6ad94e87264e04870d47/commit.html"}], "sourceIdentifier": "1d66c9f9-fff2-411a-aa19-ca6312fa25e9", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": ["x86", "32_bit", "64_bit"], "status": "affected", "versions": {"scheme": "code_commit", "value": "[f04e113279274526a8dae34de373027b68921fbf,d145acc9ef0da47131af6ad94e87264e04870d47)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "9front", "source": "cna", "vendor": "9front"}, "product": "9front", "vendor": "9front"}], "created": "2026-05-22T04:30:25.661654+00:00", "title": "Mothra Default File Path Bypass in HTML Upload Forms", "updated": "2026-05-22T04:30:25.963168+00:00", "vendors": ["9front", "9front$PRODUCT$9front"], "weaknesses": ["CWE-22"]}