Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on Windows hosts, an encoded backslash (%5C) in the request path decodes to \, which the Windows path resolver treats as a separator. serve-static then resolves a single URL segment such as admin\secret.txt into a nested file under the root and serves it, letting an attacker read static files meant to be protected behind prefix-mounted middleware. This vulnerability is fixed in 4.12.25.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, on
    Windows hosts, an encoded backslash (%5C) in the request path decodes to \, which the Windows path
    resolver treats as a separator. serve-static then resolves a single URL segment such as admin\secret.txt
    into a nested file under the root and serves it, letting an attacker read static files meant to be
    protected behind prefix-mounted middleware. This vulnerability is fixed in 4.12.25. (CVE-2026-54286)

ID	Name	Product	Family	Type	Severity
463449	Echo: hono: security update to 4.12.25	Tenable Cloud Security	Echo Local Security Checks	Local	medium
463449	Echo: hono: security update to 4.12.25	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
443302	SCA: security update for hono (GHSA-wwfh-h76j-fc44)	Tenable Cloud Security	SCA Checks	Local	medium
443302	SCA: security update for hono (GHSA-wwfh-h76j-fc44)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-54286

medium

Tenable Plugins

medium

medium

medium

medium