Is this vulnerability remotely exploitable over HTTP?

It depends on how `ssgParams` are sourced. If build-time parameters are derived directly from user-controllable input (e.g., API data that incorporates user values), remote influence is possible. If `ssgParams` are purely internal and not impacted by external input, the risk is limited to whoever controls the build configuration.

What level of access does an attacker need?

An attacker needs the ability to influence or control the values used as `ssgParams` for dynamic routes during static site generation. This could be through direct access to build configuration, manipulation of upstream data sources, or any other mechanism that feeds into parameter generation.

What is the safest general fix pattern?

The safest pattern is to treat all path fragments derived from parameters as untrusted: normalize and canonicalize paths, strictly restrict allowed characters, and enforce that the final resolved path is inside the designated output directory. Centralizing path construction and validation logic reduces the risk of individual call sites making mistakes.

Severity:

HIGH RISK

(7.5)

Path Traversal in Static Site Generation (CWE-22) in Hono toSSG()

CVE-2026-39408

Published:

Apr 8, 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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PHP Code Injection via File Upload (CWE-94) in Aero CMS Admin Post Creation

Remote Code Execution by authenticated users via malicious file upload

May 10, 2026

CWE-94

HIGH RISK

HIGH

(8.8)

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

Remote Code Execution by Authenticated Users

May 10, 2026

Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Arbitrary File Write Outside Intended Directory

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Path Traversal

CWE:

CWE-22

Impact:

Arbitrary File Write Outside Intended Directory

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Path Traversal in Static Site Generation (CWE-22) in Hono toSSG()

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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