CVE-2026-29085

MEDIUM
2026-03-04 [email protected] GHSA-p6xx-57qc-3wxr
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 22:05 vuln.today
Patch Released
Mar 06, 2026 - 18:03 nvd
Patch available
CVE Published
Mar 04, 2026 - 23:16 nvd
MEDIUM 6.5

Tags

Code Injection Hono

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.

Analysis

Hono versions up to 4.12.4 contains a vulnerability that allows attackers to injection of additional SSE fields within the same event frame if untrusted inpu (CVSS 6.5).

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +32
POC: 0

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CVE-2026-29085 vulnerability details – vuln.today
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