🛡️ CVE-2025-55526 — fastapi

🔴 CVSS 9.1 — Critical ⚠️ Exploit Public CWE-22 NVD
9.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

n8n-workflows Main Commit ee25413 allows attackers to execute a directory traversal via the download_workflow function within api_server.py

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability none.

Weakness class

CVE-2025-55526 is classified as CWE-22: Path Traversal. A file path built from user input is not confined to the intended directory, letting an attacker reach files elsewhere on the filesystem.

Affected software

CVE-2025-55526 is recorded against 3 packages.

  • fastapi
  • pydantic
  • uvicorn

Timeline and source

Published on 26 August 2025 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

github.com

Details

Severity CRITICAL
CVSS Score 9.1
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE CWE-22
Public Exploit ⚠️ Yes
Source NVD
Published 2025-08-26
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
fastapi — —
pydantic — —
uvicorn — —

References

Similar Threats

Exploit Protection

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CVE-2025-55526 carries CVSS 9.1 Critical rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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