Arbitrary file write via unchecked upload paths
Published Aug 13, 2026 · Updated Aug 14, 2026
Path traversal in Dromara lamp-cloud 5.10.0 and earlier allows remote attackers to write files outside the upload storage root. FileAnyoneController passes request-controlled bucket and bizType directory segments through Paths.get without canonicalization or traversal filtering before FileUtils writes the uploaded bytes. The /anyone route skips URI authorization, and exploitation requires a reachable upload endpoint; the attacker controls the destination directory but not the UUID leaf filename.
Summary
What happened
Path traversal in Dromara lamp-cloud 5.10.0 and earlier allows remote attackers to write files outside the upload storage root. FileAnyoneController passes request-controlled bucket and bizType directory segments through Paths.get without canonicalization or traversal filtering before FileUtils writes the uploaded bytes. The /anyone route skips URI authorization, and exploitation requires a reachable upload endpoint; the attacker controls the destination directory but not the UUID leaf filename.
The record
- CVE
- CVE-2026-19757
- Published
- Aug 13, 2026
- Updated
- Aug 14, 2026
- Vendor
- Dromara
- Product
- lamp-cloud
- Classifications
- CWE-22, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 13, 2026CVE publishedPublication date reported by the CVE source.
- Aug 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=5.0
- Affected versionversion=5.1
- Affected versionversion=5.10.0
- Affected versionversion=5.2
- Affected versionversion=5.3
- Affected versionversion=5.4
- Affected versionversion=5.5
- Affected versionversion=5.6
- Affected versionversion=5.7
- Affected versionversion=5.8
- Affected versionversion=5.9
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
- GitHub issue 412 request-level proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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