Is this vulnerability remotely exploitable?

Yes, in typical web or API deployments. If an application exposes endpoints that accept attacker-controlled URLs or path components and use fast-uri to normalize or compare them for security decisions, an external attacker can craft malicious URLs to attempt bypass.

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

The attacker generally only needs the ability to send HTTP requests or otherwise provide URL/path input processed via fast-uri. No prior authentication is required unless the affected endpoints are themselves restricted.

What is the safest general fix pattern for developers?

Use a URI/URL normalization routine that: - Applies percent-decoding and dot-segment removal in a well-defined, standards-compliant order - Produces a canonical path where traversal sequences are eliminated or rejected - Is used consistently wherever path-based decisions are made On top of that, avoid relying solely on string-prefix checks; validate that the resulting canonical path is within an allowed directory or namespace.

Severity:

HIGH RISK

(7.5)

Path Traversal via Incorrect URI Normalization (CWE-22) in fast-uri

CVE-2026-6321

Published:

May 4, 2026

Status:

Received

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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May 6, 2026

Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Path-based access control bypass and unintended resource exposure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Path-based access control bypass and unintended resource exposure

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Path Traversal via Incorrect URI Normalization (CWE-22) in fast-uri

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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