Is this vulnerability remotely exploitable?

Yes. If an attacker can control or influence the content served by a website that a Ferret operator scrapes, they can remotely influence the file paths and contents written by IO::FS::WRITE, potentially achieving code execution on the system running Ferret.

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

The attacker does not need direct access to the victim machine. They need the ability to control the responses of a site that the Ferret script processes—such as being the site owner, compromising the site, or injecting data into its output—so that they can embed malicious filenames and payloads into the scraped data.

What is the safest general fix pattern?

The most robust fix is to ensure IO::FS::WRITE and related functionality only operate within a strictly defined directory, after canonicalizing paths and rejecting any that escape this boundary. Additionally, avoid using untrusted data as file paths; instead, generate or map to controlled filenames and enforce strict validation rules.

Severity:

HIGH RISK

(8.1)

Path Traversal in IO::FS::WRITE (CWE-22) in Ferret Web Data Engine

CVE-2026-34783

Published:

Apr 6, 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

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22;CWE-73

Impact:

Arbitrary File Write leading to Remote Code Execution

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal / Directory Traversal

CWE:

CWE-22;CWE-73

Impact:

Arbitrary File Write leading to Remote Code Execution

Severity:

HIGH RISK

(8.1)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Path Traversal in IO::FS::WRITE (CWE-22) in Ferret Web Data Engine

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

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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