CVE-2026-35606

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{"affected": [{"affectedData": [{"product": "filebrowser", "vendor": "filebrowser", "versions": [{"status": "affected", "version": "< 2.63.1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*", "matchCriteriaId": "54261F6E-C227-4443-97D3-7C18CDAB15C1", "versionEndIncluding": "2.63.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. Prior to 2.63.1, the resourceGetHandler in http/resource.go returns full text file content without checking the Perm.Download permission flag. All three other content-serving endpoints (/api/raw, /api/preview, /api/subtitle) correctly verify this permission before serving content. A user with download: false can read any text file within their scope through two bypass paths. This vulnerability is fixed in 2.63.1."}], "id": "CVE-2026-35606", "lastModified": "2026-06-17T10:40:51.270", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-35606", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-09T15:15:11.604590Z", "version": "2.0.3"}}]}, "published": "2026-04-07T17:16:34.737", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-67cg-cpj7-qgc9"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-67cg-cpj7-qgc9"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-862"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,2.63.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "filebrowser", "source": "cna", "vendor": "filebrowser"}, "product": "filebrowser", "vendor": "filebrowser"}], "analysis": {"en": {"generated_at": "2026-04-07T23:20:40.992974+00:00", "value": {"mitigation_remediation": ["Upgrade File Browser to version 2.63.1 or newer, which enforces download permissions for all endpoints.", "Verify that the download permission flag is correctly configured for each user role and audit access controls.", "Restrict access to the File Browser instance to trusted IP ranges using network firewalls or reverse proxies.", "Monitor logs for anomalous /api/resources requests that return file contents from users with download: false."], "summary": {"action": "Patch Now", "impact": "Unauthorized disclosure of file content"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the File Browser product (identified as filebrowser:filebrowser). All releases prior to version 2.63.1 are vulnerable. The flaw is present in the /api/resources endpoint when requesting text file content. Upgrading to 2.63.1 or later removes the bypass by enforcing the download permission on all content\u2011serving paths.", "description_and_impact": "File Browser, a file management interface, contains an access control flaw in the resourceGetHandler of http/resource.go. Before version 2.63.1 this handler delivers the full text of any file located in the configured directory, bypassing the Perm.Download permission check. An attacker with a user account that has download: false can read arbitrary text files within their permitted scope, constituting a confidentiality breach and is classified as CWE\u2011862 Access Control Failure.", "risk_and_exploitability": "The CVSS score is 5.3, indicating moderate severity, with EPSS data unavailable and no inclusion in CISA\u2019s KEV catalog. The attack vector is network\u2011based; an attacker who authenticates to the File Browser instance and possesses a user identity lacking download permission can issue a simple HTTP GET to /api/resources and obtain the file body. No privilege escalation or remote code execution is needed, but the confidentiality impact can be significant for sensitive directories."}}}}, "created": "2026-04-08T19:36:51.493622+00:00", "updated": "2026-04-08T19:47:55.686629+00:00", "vendors": ["filebrowser", "filebrowser$PRODUCT$filebrowser"]}