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High severity · published Mar 6, 2026
CVE-2026-29087
@hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware
7.5
CVSS
0.3%
EPSS
No
On KEV
Description
@hono/node-server allows running the Hono application on Node.js. Prior to version 1.19.10, when using @hono/node-server's static file serving together with route-based middleware protections (e.g. protecting /admin/*), inconsistent URL decoding can allow protected static resources to be accessed without authorization. In particular, paths containing encoded slashes (%2F) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served. This issue has been patched in version 1.19.10.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
node-server · honojs
< 1.19.10 · source: vendor, NVD
Affected product
NO
node-server
honojs
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29087
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-29087
Patch
https://github.com/honojs/node-server/commit/455015be1697dd89974a68b70350ea7b2d126d2e
Vendor Advisory
https://github.com/honojs/node-server/security/advisories/GHSA-wc8c-qw6v-h7f6
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