Path Validation Bypass in Composio SDK Enables Sensitive File Exposure
CVE-2026-59807

8.9HIGH

Key Information:

Vendor

Composiohq

Status
Composio
Vendor
CVE Published:
8 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-59807?

The Composio SDK is affected by a path validation bypass vulnerability that allows malicious actors to read and exfiltrate sensitive files. This issue arises from the missing assertSafeFileUploadPath check in the readFileFromDisk function located in tool-file-uploads.ts. By exploiting prompt injection, attackers can manipulate file_uploadable parameters, enabling them to reference sensitive paths, including SSH private keys. This vulnerability can ultimately lead to the unauthorized uploading of credential files to storage controlled by attackers.

Affected Version(s)

composio 0 < 0.2.32-beta.283

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-59807 - Proof of Concept

References

https://github.com/ComposioHQ/composio/issues/3746
technical-descriptionexploit
https://github.com/ComposioHQ/composio/releases/tag/%40co...
release-notes
https://github.com/ComposioHQ/composio/pull/3763
issue-tracking

CVSS V4

Score:
8.9
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

George Chen
.