CVE-2026-29086CWE-1113

Hono: Cookie Attribute Injection via Unsanitized domain and path in setCookie()

Medium · published March 4, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
11.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00216 · 11.9th percentile
Weakness
CWE-1113 · Inappropriate Comment Style
Published
2026-03-04T22:09Z
EPSS history
Timeline
  • 04 MAR 22:09Z
    Hono: Cookie Attribute Injection via Unsanitized domain and path in setCookie()
    cvelistv5