TI-2026-28388 Aliases CVE-2026-39406 GHSA-92pp-h63x-v22m

@hono/node-server has a middleware bypass via repeated slashes in serveStatic

LOW 30CWE-22Published 2026-04-08 · Updated 2026-04-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-22 and the CVSS impact.

Summary

@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes (//) in the request path. When route-based middleware (e.g., /admin/*) is used for authorization, the router may not match paths containing repeated slashes, while serveStatic resolves them as normalized paths. This can lead to a middleware bypass. This vulnerability is fixed in 1.19.13.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00383 32nd percentileScored 2026-11-07

Fix Fixed node-server (honojs): 1.19.13@hono/node-server (npm): 1.19.13

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
honojs	node-server	before 1.19.13	1.19.13	Patch available	CNA
—	@hono/node-server (npm)	before 1.19.13	1.19.13	Patch available	GHSA-92pp-h63x-v22m

node-server Vendorhonojs Affected before 1.19.13 Fixed in 1.19.13 Patch available CNA
@hono/node-server (npm) Vendor— Affected before 1.19.13 Fixed in 1.19.13 Patch available GHSA-92pp-h63x-v22m

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:hono:node-server::::::node.js::*	up to 1.19.12	Vulnerable	honojs

cpe:2.3:a:hono:node-server:*:*:*:*:*:node.js:*:* Versions up to 1.19.12 Vulnerable ·honojs

Remediation

Fix · CNA node-server (honojs) Fixed in 1.19.13
Fix · GHSA-92pp-h63x-v22m @hono/node-server (npm) Fixed in 1.19.13 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-39406
2026-10-03 Alias added: GHSA-92pp-h63x-v22m

References

Advisory 2

Other 3

TI-2024-15441 @hono/node-server can't handle "double dots" in URL CVSS 3.1MEDIUM 5.3
TI-2024-21534 @hono/node-server contains Denial of Service risk when receiving Host header that cannot be parsed CVSS 3.1HIGH 7.5
TI-2026-23231 @hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences