What is the CVSS score of CVE-2026-24771?

CVE-2026-24771 has a CVSS 3.1 base score of 4.7 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Hono are affected by CVE-2026-24771?

Organizations using Hono should be aware of moderate risk from CVE-2026-24771, a cross-site scripting vulnerability rated CVSS 4.7.. A patch is available.

How to fix or mitigate CVE-2026-24771?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Hono CVE-2026-24771

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-27 security-advisories@github.com

GHSA-9r54-q6cx-xmh5

XSS Hono

4.7

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

4.7 MEDIUM

AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

Patch released

Feb 04, 2026 - 15:28 nvd

Patch available

CVE Published

Jan 27, 2026 - 20:16 nvd

MEDIUM 4.7

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

74 npm packages depend on hono (63 direct, 11 indirect)

Ecosystem-wide dependent count for version 4.11.7.

DescriptionGitHub Advisory

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, a Cross-Site Scripting (XSS) vulnerability exists in the ErrorBoundary component of the hono/jsx library. Under certain usage patterns, untrusted user-controlled strings may be rendered as raw HTML, allowing arbitrary script execution in the victim's browser. Version 4.11.7 patches the issue.

AnalysisAI

Hono's ErrorBoundary JSX component before version 4.11.7 fails to properly sanitize user-controlled input, allowing attackers to inject and execute arbitrary JavaScript in victims' browsers through reflected XSS. The vulnerability requires user interaction and network access but can compromise the confidentiality and integrity of affected applications. A patch is available in version 4.11.7.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Hono. Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.11.7, a Cross-Site Scripting (XSS) vulnerability exists in the ErrorBoundary component of the hono/jsx library. Under certain usage patterns, untrusted user-controlled strings may be rendered as raw HTML, allowing arbitrary script execution in the victim's browser. Version 4.11.7 patches the issue.

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.