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CVE-2026-39410

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score
4.8 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Vulnerability Description

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.

Vulnerability Details

Published Date
Last Modified
CWE ID
CWE-20
Source
GitHub
Vendor
npm
Product
hono

External References

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