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Response snapshot Oct 29, 2026, 01:26 UTC

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VulnerabilityCVE-2026-118663

@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths

serveStatic decodes the request path a second time after Hono has already decoded it for routing. A crafted request can be routed as one path and served as another, so middleware mounted on a static prefix does not run for a file under that prefix. Hono decodes the request path once before routing.

At a glance

Exploited
Not known
Severity
5.3 Medium (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
1 source

What to do

GitHub lists first patched versions: @hono/node-server: 2.1.3. Confirm the affected range and upgrade guidance in the exact advisory.

Read GitHub-reviewed advisory GHSA-rmxm-3fg6-px4f (opens a new tab)

What happened

Summary

serveStatic decodes the request path a second time after Hono has already decoded it for routing. A crafted request can be routed as one path and served as another, so middleware mounted on a static prefix does not run for a file under that prefix.

Details

Hono decodes the request path once before routing. serveStatic decoded it again before resolving the file. With a malformed percent-encoded sequence, the first decode leaves part of the path encoded, the router matches the encoded form, and the second decode resolves the real directory. The file is still resolved inside the configured root; this is not a traversal outside it.

Continue reading

Impact

An unauthenticated attacker may reach static files without the middleware on their prefix running, for example an authentication check. This affects applications that mount middleware on part of the directory served by serveStatic. Applications that serve only public files are not affected.

Affected package ranges reported by GitHub: @hono/node-server: >= 1.19.10, < 2.1.3

Scores and how they were measured

CVSS base severity

5.3

Version 3.1As of

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    GitHub-reviewed advisory GHSA-rmxm-3fg6-px4f (opens a new tab)

    The public advisory supplies the description, affected package/version ranges, and any listed CVSS metric. GitHub review is not local review.

    Published Checked

  2. Primary source

    GitHub public advisory API page (opens a new tab)

    The API page supplied GHSA-rmxm-3fg6-px4f, its actual identifiers, source dates, and structured metrics.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 28). @hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths (CVE-2026-118663). https://kevwire.com/record/CVE-2026-118663

MLA

"@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths (CVE-2026-118663)." KEVWire, 28 Oct. 2026, kevwire.com/record/CVE-2026-118663.

Chicago

KEVWire. "@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths (CVE-2026-118663)." Last modified October 28, 2026. https://kevwire.com/record/CVE-2026-118663.

Evidence summary (plain text)

@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths (Oct 28, 2026).
serveStatic decodes the request path a second time after Hono has already decoded it for routing. A crafted request can be routed as one path and served as another, so middleware mounted on a static prefix does not run for a file under that prefix.

Hono decodes the request path once before routing. serveStatic decoded it again before resolving the file. With a malformed percent-encoded sequence, the first decode leaves part of the path encoded, the router matches the encoded form, and the second decode resolves the real directory.
CVSS 5.3 (version 3.1; evidence as of Oct 28, 2026; https://github.com/advisories/GHSA-rmxm-3fg6-px4f).
Sources:
GitHub-reviewed advisory GHSA-rmxm-3fg6-px4f: https://github.com/advisories/GHSA-rmxm-3fg6-px4f
GitHub public advisory API page: https://api.github.com/advisories?type=reviewed&per_page=100&sort=updated&direction=desc
Record ID: CVE-2026-118663.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 29, 2026, 00:55 UTC. Ingestion is not an independent editorial investigation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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Record details

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