Is this vulnerability remotely exploitable over the internet?

Yes, if the Emmett application exposes `/__emmett__` endpoints to the internet, a remote attacker with network access can attempt to exploit the traversal using crafted URLs.

Does exploitation require authentication or special privileges?

Not inherently. If `/__emmett__` paths are publicly reachable and not behind authentication, the attack can often be performed by any unauthenticated user who can send HTTP requests to the application.

What is the safest general fix pattern for affected code?

The safest pattern is to treat all path components derived from user input as untrusted, normalize the complete path, and verify that the resolved path remains strictly within a predefined static root directory. Any request that attempts to escape this directory should be rejected.

Severity:

CRITICAL RISK

(9.1)

Path Traversal (CWE-22) in Emmett RSGI Static Handler for Internal Assets

CVE-2026-39847

Published:

Apr 7, 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

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Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Arbitrary File Read / Information Disclosure

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Arbitrary File Read / Information Disclosure

Severity:

CRITICAL RISK

(9.1)

CVSS Version:

3.1

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Path Traversal (CWE-22) in Emmett RSGI Static Handler for Internal Assets

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

(8.8)

PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

HIGH RISK

HIGH

(8.8)

Code Injection (CWE-94) via Module Parameters in Evolution CMS

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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