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PatchSiren cyber security CVE debrief

CVE-2026-41948 langgenius CVE debrief

A critical path traversal vulnerability in Dify (versions ≤1.14.1) allows authenticated attackers to escape tenant isolation boundaries and access the Plugin Daemon's internal REST API. The flaw stems from insufficient URL path sanitization, enabling traversal via unencoded dot sequences in task identifiers or manipulated filename parameters. Attackers with knowledge of a victim tenant's UUID can reach internal endpoints including debug interfaces. The attack surface is expanded by Dify Cloud's unauthenticated free self-registration, allowing trivial account creation. The vulnerability was disclosed on 2026-05-18 and modified on 2026-05-19. A patch is available via pull request.

Vendor
langgenius
Product
dify
CVSS
CRITICAL 9.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-18
Original CVE updated
2026-06-22
Advisory published
2026-05-18
Advisory updated
2026-06-22

Who should care

Organizations operating Dify self-hosted instances or using Dify Cloud services; security teams responsible for multi-tenant SaaS application isolation; DevOps engineers managing Plugin Daemon deployments; compliance officers evaluating tenant boundary controls in AI/LLM orchestration platforms

Technical summary

The vulnerability exists in Dify's request forwarding mechanism to the Plugin Daemon's internal REST API. Insufficient sanitization of URL paths allows authenticated users to inject directory traversal sequences (unencoded dot-dot patterns) through task identifiers or filename parameters. This bypasses tenant-scoped path restrictions, enabling access to internal endpoints when combined with knowledge of target tenant UUIDs. The Plugin Daemon's internal API, intended for inter-service communication, exposes debug interfaces and administrative functions that should not be reachable from tenant contexts. The CVSS 4.0 vector (AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N) reflects network attackability with high attack complexity but no required privileges or user interaction, yielding high impacts to confidentiality and integrity with limited availability impact.

Defensive priority

critical

Recommended defensive actions

  • Upgrade Dify to version 1.14.2 or later when available, applying the patch from the vendor pull request
  • If immediate patching is not possible, implement network-level access controls restricting Plugin Daemon internal API exposure
  • Monitor for anomalous API requests containing path traversal patterns (dot-dot sequences) in task identifiers or filename parameters
  • Review tenant isolation configurations and ensure UUID-based path validation is enforced at the application layer
  • For Dify Cloud deployments, consider implementing additional authentication verification steps given the unauthenticated registration vector
  • Audit access logs for requests to internal debug endpoints from non-administrative sources

Evidence notes

Vulnerability confirmed through NVD with CVSS 4.0 vector. CPE confirms affected versions through 1.14.1. Multiple independent sources (VulnCheck advisory, Huntr bounty platform, GitHub pull request) corroborate technical details. CWE-23 (Relative Path Traversal) classified as primary weakness.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-41948 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-41948

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-41948 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-41948

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.