{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-35585", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-04-03T20:09:02.828Z", "datePublished": "2026-04-07T16:20:46.019Z", "dateUpdated": "2026-04-08T18:51:09.641Z"}, "containers": {"cna": {"title": "File Browser has a Command Injection via Hook Runner", "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": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw"}, {"name": "https://github.com/filebrowser/filebrowser/issues/5199", "tags": ["x_refsource_MISC"], "url": "https://github.com/filebrowser/filebrowser/issues/5199"}], "affected": [{"vendor": "filebrowser", "product": "filebrowser", "versions": [{"version": ">= 2.0.0-rc.1, <= 2.63.1", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-04-07T16:20:46.019Z"}, "descriptions": [{"lang": "en", "value": "File Browser is a file managing interface for uploading, deleting, previewing, renaming, and editing files within a specified directory. From 2.0.0 through 2.63.1, the hook system in File Browser \u2014 which executes administrator-defined shell commands on file events such as upload, rename, and delete \u2014 is vulnerable to OS command injection. Variable substitution for values like $FILE and $USERNAME is performed via os.Expand without sanitization. An attacker with file write permission can craft a malicious filename containing shell metacharacters, causing the server to execute arbitrary OS commands when the hook fires. This results in Remote Code Execution (RCE). This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations."}], "source": {"advisory": "GHSA-jvpw-637p-h3pw", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-04-08T18:51:05.762537Z", "id": "CVE-2026-35585", "options": [{"Exploitation": "poc"}, {"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": "2026-04-08T18:51:09.641Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*", "matchCriteriaId": "D4AEEB27-AA85-4D9B-8D23-0528321C3156", "versionEndIncluding": "2.63.1", "versionStartIncluding": "2.0.0", "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. From 2.0.0 through 2.63.1, the hook system in File Browser \u2014 which executes administrator-defined shell commands on file events such as upload, rename, and delete \u2014 is vulnerable to OS command injection. Variable substitution for values like $FILE and $USERNAME is performed via os.Expand without sanitization. An attacker with file write permission can craft a malicious filename containing shell metacharacters, causing the server to execute arbitrary OS commands when the hook fires. This results in Remote Code Execution (RCE). This feature has been disabled by default for all installations from v2.33.8 onwards, including for existent installations."}], "id": "CVE-2026-35585", "lastModified": "2026-04-16T18:44:06.180", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.5, "baseSeverity": "HIGH", "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": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/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": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-04-07T17:16:33.980", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/filebrowser/filebrowser/issues/5199"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-jvpw-637p-h3pw"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-88"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-78"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[2.0.0-rc.1,2.63.1]"}}], "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": "2026-04-07T23:21:17.882355+00:00", "value": {"mitigation_remediation": ["Upgrade File Browser to a release equal to or newer than 2.33.8, where the hook feature is disabled by default.", "If immediate upgrade is not possible, explicitly disable the hook functionality in the configuration file or through the admin interface.", "Restrict file write permissions to only trusted administrators, preventing non\u2011privileged users from creating malicious filenames.", "Monitor the target directory for unusual filename patterns that may indicate an attempt to trigger the hook.", "Apply vendor advisories referenced in the GitHub issue tracker and security advisory for additional guidance."], "summary": {"action": "Immediate Patch", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The flaw affects File Browser versions 2.0.0 through 2.63.1. In all releases prior to version 2.33.8 the hook feature is enabled by default, while from 2.33.8 onward it is disabled. Existing installations that have not updated or that have not disabled the hook remain vulnerable, whereas fresh deployments of v2.33.8 or newer are not susceptible unless the option is re\u2011enabled.", "description_and_impact": "The vulnerability arises from the hook system in File Browser, which executes administrator\u2011defined shell commands when file events occur. Because variable placeholders such as $FILE and $USERNAME are expanded using os.Expand without sanitization, a maliciously crafted filename containing shell metacharacters can cause the server to run arbitrary OS commands. An attacker with write permission to the target directory can exploit this on any installation that has the hook functionality enabled, leading to unrestricted remote code execution.", "risk_and_exploitability": "The CVSS score is 7.5, indicating high severity, and the vulnerability is not listed in the CISA KEV catalog. Although the EPSS metric is unavailable, the possibility of exploitation requires the attacker to write a file to a monitored directory, which is a common capability in many deployments. Given that the error can trigger full command execution, the risk is significant for any system that still allows the hook mechanism to run; an attacker who succeeds would gain control of the host."}}}}, "created": "2026-04-08T19:36:55.724049+00:00", "updated": "2026-04-08T19:47:59.988921+00:00", "vendors": ["filebrowser", "filebrowser$PRODUCT$filebrowser"]}