Is this vulnerability remotely exploitable over the internet?

Yes, as described, the `/api/download/attatchment` endpoint does not require authentication. If it is exposed to the internet, an unauthenticated remote attacker can interact with it and trigger SSRF requests from the Kan server.

What level of access does an attacker need to exploit this issue?

The attacker only needs network access to the vulnerable endpoint. No valid user account or prior foothold is required, which significantly widens the exposure in internet-facing deployments.

What is the safest general fix pattern for this kind of vulnerability?

A robust fix combines adding authentication/authorization, enforcing URL allowlists or strict patterns for outbound requests, and blocking access to private networks and metadata services. Where possible, redesign functionality so that the server does not act as a generic URL proxy based on user input.

Severity:

HIGH RISK

(8.6)

Server-Side Request Forgery (CWE-918) in Kan Attachment Download API

CVE-2026-32255

Published:

Mar 18, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-918

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

Unauthorized Access to Internal Resources via SSRF

May 6, 2026

CWE-863

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Privilege Escalation via Bypassed Access Control

May 6, 2026

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Network pivoting and unauthorized access to internal or cloud-only HTTP services

Severity:

HIGH RISK

(8.6)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Network pivoting and unauthorized access to internal or cloud-only HTTP services

Severity:

HIGH RISK

(8.6)

CVSS Version:

3.1

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that knows every line of it.

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Ask AI for summary of CodeAnt

Server-Side Request Forgery (CWE-918) in Kan Attachment Download API

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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