CVE-2026-24473

Hono has an Arbitrary Key Read in Serve static Middleware (Cloudflare Workers Adapter)

CVSS 4.0 6.3 MEDIUMEUVD CVSS 4.0 6.3 CVSS 4.0 · [email protected] · Secondary 6.3 MEDIUMCVSS 3.1 · [email protected] · Primary 5.3 MEDIUMCVSS_V3 CVSS_V4 Publisher rating MODERATEFixed by hono 4.11.7KEV status unknown

Original advisory

cve-program · CVE-2026-24473

Published

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.

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euvd · EUVD-2026-4751

Published

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nvd · CVE-2026-24473

Published

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osv · GHSA-w332-q679-j88p

Published

## Summary 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. ## Details The vulnerability exists in the serve-static middleware used with the Cloudflare Workers adapter. When serving static assets, the middleware does not sufficiently validate or restrict user-supplied paths before resolving them against the Workers asset storage. As a result, an attacker may craft requests that access arbitrary keys beyond the intended static asset scope. This issue only affects applications running on Cloudflare Workers that use Serve static Middleware with user-controllable request paths. ## Impact This vulnerability may lead to information disclosure by allowing unauthorized access to internal assets or data stored in the Workers environment. The exposed data is limited to readable asset keys and does not allow modification of stored data or execution of arbitrary code. The impact is limited to applications that use Serve static Middleware in the Cloudflare Workers adapter and rely on it to safely handle untrusted request paths. ## Affected Components * Serve static Middleware (Cloudflare Workers adapter)

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Affected versions, risk and source history

Exploitation and risk

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Advisory history

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15 Nov 2026 11:12:16 UTC