Description

Unauthenticated Server Side Request Forgery (SSRF) in OttoKit <= 1.1.35 versions.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.2",
  "pubDate": "2026-08-18T15:16:53.623Z",
  "pubdate": "2026-08-18T15:16:53.623Z",
  "executiveSummary": "An unauthenticated Server-Side Request Forgery (SSRF) vulnerability has been identified in OttoKit versions <= 1.1.35. This security flaw allows remote, unauthenticated attackers to induce the vulnerable application into initiating HTTP requests or other network protocol interactions to arbitrary destinations, including internal network resources that are typically shielded from the public internet. The vulnerability exposes the underlying infrastructure to potential unauthorized access, data exfiltration, and internal service enumeration. Exploitation requires network access to the target OttoKit instance, but no prior authentication or administrative privileges are necessary. The presence of this vulnerability poses significant risk implications, potentially leading to a complete compromise of internal architecture if backend services lack adequate authentication or network segmentation. Remediation requires updating OttoKit to a patched version once available or implementing strict network-level egress filtering and input validation on URL parameters handled by the application.",
  "technicalDetails": "The vulnerability resides in the request-handling mechanisms of OttoKit <= 1.1.35, specifically within components that process user-supplied URLs or external resource identifiers without sufficient sanitization, validation, or allowlisting. The root cause is the failure of the application to restrict outbound network connections initiated on behalf of client requests. When an unauthenticated user supplies a maliciously crafted URI payload to the vulnerable endpoint, the underlying application parses and attempts to fetch or interact with the specified target address. The attack flow begins with the malicious client transmitting an HTTP request containing the targeted internal or external URL payload to the vulnerable OttoKit service. Lacking proper input filtering, the application processes the parameter and executes a backend request to the specified destination. This allows attackers to bypass perimeter firewalls, access internal metadata services, scan internal subnet ports, and interact with microservices or databases that rely on network location for trust. The network exposure is external, making the endpoint publicly accessible to any unauthenticated entity. Because no authentication or privilege requirements are mandated by the vulnerable parameter handling, the barrier to exploitation is exceptionally low. Post-exploitation impact varies depending on the internal network topology, but typically includes internal reconnaissance, unauthorized data retrieval from local services, and potential Remote Code Execution (RCE) if vulnerable internal administrative interfaces are successfully targeted via the SSRF payload."
}