CVE-2026-29086

MEDIUM

5.4

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, the setCookie() utility did not validate semicolons (;), carriage returns (\r), or newline characters (\n) in the domain and path options when constructing the Set-Cookie header. Because cookie attributes are delimited by semicolons, this could allow injection of additional cookie attributes if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.

CVE Details

CVSS v3.1 Score5.4

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published3/4/2026

Last Modified3/6/2026

Sourcenvd

Honeypot Sightings0

Affected Products

hono:hono

Weaknesses (CWE)

CWE-1113

References

https://github.com/honojs/hono/commit/44ae0c8cc4d5ab2bed529127a4ac72e1483ad073(security-advisories@github.com)

https://github.com/honojs/hono/security/advisories/GHSA-5pq2-9x2x-5p6w(security-advisories@github.com)

IOC Correlations

No correlations recorded

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