CVE-2026-29085

MEDIUM

6.5

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.

CVE Details

CVSS v3.1 Score6.5

SeverityMEDIUM

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published3/4/2026

Last Modified3/6/2026

Sourcenvd

Honeypot Sightings0

Affected Products

hono:hono

Weaknesses (CWE)

CWE-74

References

https://github.com/honojs/hono/commit/f4123ed9ea3c7c52380cc99a079a4d773838846e(security-advisories@github.com)

https://github.com/honojs/hono/security/advisories/GHSA-p6xx-57qc-3wxr(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.