CVE-2026-39410

Published Apr 8, 2026

Last updated 2 days ago

Overview

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.
Source
security-advisories@github.com
NVD status
Analyzed
Products
hono

Risk scores

CVSS 3.1

Type
Secondary
Base score
4.8
Impact score
2.5
Exploitability score
2.2
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Severity
MEDIUM

Weaknesses

security-advisories@github.com
CWE-20
nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

Configurations