CVE-2026-29087 — HIGH (7.5)

Q: How severe is CVE-2026-29087?

CVE-2026-29087 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2026-29087?

Check the references section above for vendor advisories and patch information. Affected products include: Hono Node-Server.

Vulnerability 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 Score

7.5

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Hono	Node-Server	< 1.19.10

Related Weaknesses (CWE)

CWE-863

References

FAQ

What is CVE-2026-29087?

CVE-2026-29087 is a vulnerability with a CVSS score of 7.5 (HIGH). @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. pr...

How severe is CVE-2026-29087?

CVE-2026-29087 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-29087?

Check the references section above for vendor advisories and patch information. Affected products include: Hono Node-Server.