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CVE

CVE-2026-29087

@hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware
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CVE

CVE-2026-29087

@hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware

@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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/29xxx/CVE-2026-29087.json, https://github.com/honojs/node-server/security/advisories/GHSA-wc8c-qw6v-h7f6, https://nvd.nist.gov/vuln/detail/CVE-2026-29087, https://github.com/honojs/node-server/commit/455015be1697dd89974a68b70350ea7b2d126d2e

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00018%
EPSS Percentile
0.04779%
Introduced Version
0
Fix Available
2f8ca3665f5257305603783ec9999bd1a9bec0f2,9.1.10-r7,3.160.0-r1,0.8.3-r0,2.19.5-r3,2.19.5-r1,4.14.5-r2

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