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VULNERABILITIES

CVE-2026-29085 Details

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using streamSSE() in Streaming Helper, the event, id, and retry fields were not validated for carriage return (\r) or newline (\n) characters. Because the SSE protocol uses line breaks as field delimiters, this could allow injection of additional SSE fields within the same event frame if untrusted input was passed into these fields. This issue has been patched in version 4.12.4.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/honojs/hono/commit/f4123ed9ea3c7c52380cc99a079a4d773838846e [email protected]Patch
https://github.com/honojs/hono/security/advisories/GHSA-p6xx-57qc-3wxr [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')[email protected]

Affected Products

ProductVersions
hono hono
< 4.12.4

CPE

  • cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-29085
NVD Published Date:
Mar 4, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-29085 Details - Not Deferred