CVE-2026-65702
Deferred Deferred - Pending Action

Vanna Path Traversal in FileSystemConversationStore

Publication date: 2026-07-23

Last updated on: 2026-07-23

Assigner: VulnCheck

Description
Vanna through 2.0.2 contains a path traversal vulnerability in the FileSystemConversationStore persistence integration that allows unauthenticated remote attackers to write attacker-controlled JSON files to arbitrary filesystem locations and read conversation metadata from outside the intended store base directory. Attackers can supply path traversal sequences in the conversation_id parameter submitted to the unauthenticated chat API endpoints to escape the base directory during both write and read operations, enabling arbitrary file write with attacker-controlled content and unauthorized file read on the server filesystem.

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Meta Information

Published
2026-07-23
Last Modified
2026-07-23
Generated
2026-07-23
AI Q&A
2026-07-23
EPSS Evaluated
N/A
NVD
CVE-2026-65702
EUVD
EUVD-2026-48335

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

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Executive Summary

CVE-2026-65702 is a path traversal vulnerability in Vanna through 2.0.2 that allows unauthenticated remote attackers to write attacker-controlled JSON files to arbitrary filesystem locations and read conversation metadata outside the intended store base directory. The flaw occurs because the server concatenates a client-supplied conversation_id parameter directly to a base directory without sanitization, enabling path traversal sequences like ../../../../ to escape the intended directory.

Detection Guidance

Check Vanna server logs for unusual file access patterns or path traversal sequences in conversation_id parameters. Inspect filesystem for unexpected JSON files outside the intended storage directory. Monitor network traffic for unauthenticated chat API requests with suspicious conversation_id values containing sequences like ../../../../.

Impact Analysis

This vulnerability allows attackers to write arbitrary files with controlled content anywhere on the server filesystem and read sensitive files outside the intended storage directory. This could lead to file tampering, unauthorized data access, or even code execution if files are placed in executable or auto-loaded locations. The impact includes potential server compromise and data breaches.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, violating GDPR's data protection principles and HIPAA's security requirements for protected health information. It may result in data breaches, unauthorized disclosure of personal or health data, and failure to maintain adequate security controls required by these regulations.

Mitigation Strategies

Upgrade to a patched version of Vanna if available. If not, disable the FileSystemConversationStore integration immediately. Implement input validation to sanitize conversation_id parameters, rejecting any values containing path traversal sequences. Restrict file write permissions and ensure the storage directory is isolated from sensitive system paths.

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