@hono/node-server: Backslash
Affects @hono/node-serverSource GCVE Database
Not known to be exploited · CVSS 5.3 Medium : upgrade to 2.1.6 when convenient.
Data as of 12 Nov 2026, 22:37 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 5.3 |
|---|
- Patch
- Available – fixed in 2.1.6, 1.19.18
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 12 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.
What to do
Upgrade @hono/node-server to 2.1.6; @hono/node-server to 1.19.18.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npm@hono/node-server | Affected
| Fixed in
|
| npm@hono/node-server | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade @hono/node-server to version 2.1.6 or later, or 1.19.18 or later, where the issue is fixed by rejecting requests containing raw backslashes in the path with a 400 Bad Request response. This prevents the bypass of path-based access controls by ensuring invalid request-targets are not processed.
Description
@hono/node-server improperly parses backslashes in request paths as path separators, allowing bypass of path-based access controls enforced by reverse proxies that do not normalize backslashes. This can cause requests intended to be blocked by a proxy to reach protected routes within the application.
References
- github.com/honojs/node-server/security/advisories/GHSA-jpvv-r467-5p4w (opens in a new tab)
- github.com/honojs/node-server/commit/3868998a805ae79216535ad3986c1e7228dee313 (opens in a new tab)
- github.com/honojs/node-server/commit/fb97395ec36af66567c76976e741110b02804d1c (opens in a new tab)
- github.com/honojs/node-server (opens in a new tab)
- github.com/honojs/node-server/releases/tag/v1.19.18 (opens in a new tab)
- github.com/honojs/node-server/releases/tag/v2.1.6 (opens in a new tab)