Unauthenticated file deletion via pre-sanitization path join
Published May 14, 2026 · Updated May 14, 2026
Path traversal in FileBrowser Quantum before 1.3.1-stable and 1.3.9-beta allows remote attackers to delete files via public shares. The public resource middleware and bulk-delete handler join attacker-controlled paths to the share base before SanitizeUserPath processes traversal elements. Exploitation requires a valid public-share hash with deletion enabled and permits deletion outside the shared directory within the share owner's configured storage scope.
Summary
What happened
Path traversal in FileBrowser Quantum before 1.3.1-stable and 1.3.9-beta allows remote attackers to delete files via public shares. The public resource middleware and bulk-delete handler join attacker-controlled paths to the share base before SanitizeUserPath processes traversal elements. Exploitation requires a valid public-share hash with deletion enabled and permits deletion outside the shared directory within the share owner's configured storage scope.
The record
- CVE
- CVE-2026-44542
- Published
- May 14, 2026
- Updated
- May 14, 2026
- Vendor
- Graham Steffaniak
- Product
- FileBrowser Quantum
- Classifications
- CWE-22, T1485
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 14, 2026CVE publishedPublication date reported by the CVE source.
- May 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 1.3.1-stable
- Affected versionversion=< 1.3.9-beta
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Public-share DELETE path traversal curl proof of conceptfunctional · demonstrated
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Technologies
Your stack
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Your stack
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