6.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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CVE-2026-24473

CVE-2026-24473: Hono has an Arbitrary Key Read in Serve static Middleware (Cloudflare Workers Adapter)

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, Serve static Middleware for the Cloudflare Workers adapter contains an information disclosure vulnerability that may allow attackers to read arbitrary keys from the Workers environment. Improper validation of user-controlled paths can result in unintended access to internal asset keys. Version 4.11.7 contains a patch for the issue.

(GitHub Advisory)

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CVE-2026-24473

CVE-2026-24473:

6.3

CVSS Score

4.0

-

CVSS Score

Basic Information

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Technical Details

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
hono	npm	< 4.11.7	4.11.7

Technical Details

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Root Cause Analysis

The vulnerability lies in the serve-static middleware for the Cloudflare Workers adapter in Hono. The provided commit cf9a78db4d0a19b117aee399cbe9d3a6d9bfd817 clearly shows the patch that fixes the vulnerability. The change is in the getContentFromKVAsset function in the file src/adapter/cloudflare-workers/utils.ts. The vulnerable code const key = ASSET_MANIFEST[path] || path allowed the use of a user-controlled path as a key for accessing Workers KV assets if the path was not found in the ASSET_MANIFEST. This could be exploited by an attacker to read arbitrary keys from the environment. The fix removes the fallback to the raw path, ensuring that only keys present in the ASSET_MANIFEST can be accessed. Therefore, the getContentFromKVAsset function is the vulnerable function that would appear in a runtime profile during exploitation.

Vulnerable functions

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WAF Rule

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Reasoning

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