4.7

CVE-2026-24771: hono Cross-site Scripting

CVSS: 4.7v3.1MediumAnalyzed
AliasesCGA-5cgx-h8h9-rpccCGA-q856-2gv9-r8fcGHSA-9r54-q6cx-xmh5
Published 27-01-2026Last modified 27-01-2026
Open JSON

Vulnerability summary

CVE-2026-24771 is a medium (CVSS 4.7) Cross-site Scripting vulnerability in hono. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.4% of scored vulnerabilities.

Overall risk
19/100
0100
Low · default modelHow is this calculated?
CVSS score
4.7/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-R373-M326-86RJ

Timeline

  1. 27-01-2026
    PublishedVulnerability first disclosed.
  2. 27-01-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.04 pp

From 0.31% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard10 products
  • honoAll versions (No fix recorded)
  • hono-adapter-mqttAll versions (No fix recorded)
  • hono-cliAll versions (No fix recorded)
  • hono-compatAll versions (No fix recorded)
  • hono-service-authAll versions (No fix recorded)
Hono1 product
Honojs1 product
Npm1 product
  • hono< 4.11.7
Wolfi1 product
  • langfuse-3-worker< 3.153.0-r0

5 vendors · 14 products

References

5 links