Compliance Impact

The vulnerability allows attackers to traverse outside their authorized tenant path and access internal endpoints, potentially exposing sensitive data or debug interfaces.

Because Dify Cloud allows unauthenticated free self-registration, attackers can easily create accounts to exploit this flaw, increasing the risk of unauthorized data access.

Such unauthorized access to internal data or systems could lead to violations of data protection regulations like GDPR or HIPAA, which require strict controls on data access and protection of personal or sensitive information.

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Executive Summary

CVE-2026-41948 is a path traversal vulnerability in Dify version 1.14.1 and earlier. It occurs because the Plugin Daemon's internal REST API does not properly sanitize URL paths. Authenticated users can manipulate requests by including unencoded dot sequences (like "..") or manipulated filename parameters in task identifiers. This allows them to traverse outside their authorized tenant path and access internal endpoints such as debug interfaces. The vulnerability requires only knowledge of the victim tenant's UUID to exploit.

The root cause is insufficient validation in the function that prepares requests to the Plugin Daemon, where user-supplied paths are joined to the internal API base URL without proper checks. The fix involves decoding and checking the path for traversal sequences before constructing the URL, rejecting any path containing such sequences.

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Impact Analysis

This vulnerability can have serious security impacts. Attackers who exploit it can access internal endpoints of the Dify Plugin Daemon that they should not be authorized to reach. This includes sensitive debug interfaces and potentially other internal resources.

Because Dify Cloud allows unauthenticated free self-registration, attackers can easily create accounts to gain authenticated access and exploit this vulnerability. This increases the risk of unauthorized data access or manipulation within the affected system.

The CVSS score of 9.2 indicates a high severity, meaning the vulnerability poses a significant risk to confidentiality and integrity, with limited impact on availability.

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Detection Guidance

This vulnerability involves path traversal via manipulated URL paths in requests forwarded to the Plugin Daemon's internal REST API. Detection can focus on monitoring for suspicious requests containing unencoded or encoded dot sequences such as "..", "%2e%2e", or double-encoded sequences like "%252e%252e" in task identifiers or filename parameters.

Network or system detection can include inspecting logs or traffic for such traversal sequences attempting to access internal endpoints outside authorized tenant paths.

Suggested commands might include using tools like grep or network monitoring utilities to search for these patterns in logs or captured traffic. For example:

• grep -E '\.\.|%2e%2e|%252e%252e' /path/to/dify/logs/access.log
• tcpdump -A -s 0 'tcp port 80 or tcp port 443' | grep -E '\.\.|%2e%2e|%252e%252e'

These commands help identify attempts to exploit the path traversal by detecting suspicious URL path segments in requests.

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Mitigation Strategies

Immediate mitigation steps include applying the security fix that adds strict validation and decoding of URL paths before forwarding requests to the Plugin Daemon's internal API.

Specifically, the fix implemented in Dify involves decoding the path and rejecting any segments that match traversal sequences such as "..", "%2e%2e", or double-encoded variants, preventing unauthorized path traversal.

Additionally, since Dify Cloud allows unauthenticated free self-registration, consider restricting or monitoring account creation to reduce the risk of attackers easily creating accounts to exploit this vulnerability.

If patching immediately is not possible, monitor and block suspicious requests containing traversal sequences and limit access to internal debug interfaces.

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