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Moderate severityNVD Advisory· Published Mar 4, 2026· Updated Mar 5, 2026

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

CVE-2026-29086

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
hononpm
< 4.12.44.12.4

Affected products

15

Patches

Vulnerability mechanics

References

4

News mentions

0

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