CVE-2026-39410

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a discrepancy between browser cookie parsing and parse() handling allows cookie prefix protections to be bypassed. Cookie names that are treated as distinct by the browser may be normalized to the same key by parse(), allowing attacker-controlled cookies to override legitimate ones. This vulnerability is fixed in 4.12.12.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0	Third Party Advisory
https://github.com/honojs/hono/releases/tag/v4.12.12	Release Notes
https://github.com/honojs/hono/security/advisories/GHSA-r5rp-j6wh-rvv4	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-04-08 15:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-39410

Mitre link : CVE-2026-39410

CVE.ORG link : CVE-2026-39410

JSON object : View

Products Affected

hono

hono

CWE

CWE-20

Improper Input Validation

NVD-CWE-noinfo

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