CVE-2026-39406 json
@hono/node-server has a middleware bypass via repeated slashes in serveStatic
published 2026-04-08 7 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-20491 , GHSA-92pp-h63x-v22m
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
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.
Patch / fix
- npm @hono/node-server 1.19.13
- hono node-server 1.19.13
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @hono/node-server | <1.19.13 |
1.19.13 |
Affected products
- honojs node-server
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
github.com
/honojs/node-server/commit/025c30f55d589ddbe6048b151d77e904f67a8cc2
web
-
github.com
/honojs/node-server/security/advisories/GHSA-92pp-h63x-v22m
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-39406
advisory
-
github.com
/honojs/node-server
package
-
github.com
/honojs/node-server/releases/tag/v1.19.13
web
Sources
- CVE List CVE-2026-39406
- GitHub Advisory GHSA-92pp-h63x-v22m
- NVD CVE-2026-39406
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.