Authenticated file overwrite via unrestricted fs_path
Published Dec 19, 2025 · Updated Dec 19, 2025
Arbitrary file write in Langflow before 1.7.0 allows remote authenticated users to overwrite server-accessible files through the flow API. The create-flow handler accepts an unrestricted fs_path, creates the referenced path, and writes serialized Flow JSON in overwrite mode without normalization or directory containment. An API key or JWT is required, and writes are limited by the server process permissions and the fixed JSON content.
Summary
What happened
Arbitrary file write in Langflow before 1.7.0 allows remote authenticated users to overwrite server-accessible files through the flow API. The create-flow handler accepts an unrestricted fs_path, creates the referenced path, and writes serialized Flow JSON in overwrite mode without normalization or directory containment. An API key or JWT is required, and writes are limited by the server process permissions and the fixed JSON content.
The record
- CVE
- CVE-2025-68478
- Published
- Dec 19, 2025
- Updated
- Dec 19, 2025
- Vendor
- Langflow
- Product
- Langflow
- Classifications
- CWE-73, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Dec 19, 2025CVE publishedPublication date reported by the CVE source.
- Dec 19, 2025Record 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=< 1.7.0
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
- Authenticated arbitrary file-write curl proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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