CVE-2026-29086

MEDIUM
2026-03-04 [email protected] GHSA-5pq2-9x2x-5p6w
5.4
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
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 - 18:00 nvd
Patch available
CVE Published
Mar 04, 2026 - 23:16 nvd
MEDIUM 5.4

Tags

Code Injection Hono

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.

Analysis

Hono versions up to 4.12.4 contains a vulnerability that allows attackers to injection of additional cookie attributes if untrusted input was passed into the (CVSS 5.4).

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Vendor patch is available.

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Priority Score

27
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +27
POC: 0

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CVE-2026-29086 vulnerability details – vuln.today
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