Medium

Named path parameters can be overridden in TrieRouter

  • Disclosed: 15.12.2023
  • Updated: 11.10.2026 10:22

Impact

The clients may override named path parameter values from previous requests if the application is using TrieRouter. So, there is a risk that a privileged user may use unintended parameters when deleting REST API resources.

TrieRouter is used either explicitly or when the application matches a pattern that is not supported by the default RegExpRouter.

The code to reproduce it. The server side application:

ts
import { Hono } from 'hono'
import { TrieRouter } from 'hono/router/trie-router'

const wait = async (ms: number) => {
  return new Promise((resolve) => {
    setTimeout(resolve, ms)
  })
}

const app = new Hono({ router: new TrieRouter() })

app.use('*', async (c, next) => {
  await wait(Math.random() * 200)
  return next()
})

app.get('/modules/:id/versions/:version', async (c) => {
  const id = c.req.param('id')
  const version = c.req.param('version')

  console.log('path', c.req.path)
  console.log('version', version)

  return c.json({
    id,
    version,
  })
})

export default app

The client code which makes requests to the server application:

ts
const examples = [
  'http://localhost:8787/modules/first/versions/first',
  'http://localhost:8787/modules/second/versions/second',
  'http://localhost:8787/modules/third/versions/third',
]

const test = () => {
  for (const example of examples) {
    fetch(example)
      .then((response) => response.json())
      .then((data) => {
        const splitted = example.split('/')
        const expected = splitted[splitted.length - 1]

        if (expected !== data.version) {
          console.error(`Error: exprected ${expected} but got ${data.version} - url was ${example}`)
        }
      })
  }
}

test()

The results:

Error: exprected second but got third - url was http://localhost:8787/modules/second/versions/second
Error: exprected first but got third - url was http://localhost:8787/modules/first/versions/first

Patches

"v3.11.7" includes the change to fix this issue.

Workarounds

Don't use TrieRouter directly.

ts
// DON'T USE TrieRouter
import { TrieRouter } from 'hono/router/trie-router'
const app = new Hono({ router: new TrieRouter() })

References

Router options on the Hono website: https://hono.dev/api/hono#router-option

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package hono < 3.11.7 3.11.7

References

CVSS score 4.2/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L
Weakness (CWE)
CWE-94
Platform
npm
Package
hono
Disclosed
15.12.2023
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-f6gv-hh8j-q8vq - CC BY 4.0

Vulnerability history: hono

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (52) in the archive
Total entries
52
First → latest
12.2023 10.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 7
  • Medium 41
  • Low 4

Disclosures per year

  1. 2023: 1
  2. 2024: 3
  3. 2025: 4
  4. 2026: 44
Severity:
  1. High · 8.1 CVE-2025-62610 >= 1.1.0, < 4.10.2 4.10.2
  2. High · 7.5 CVE-2025-58362 >= 4.8.0, < 4.9.6 4.9.6
  3. Named path parameters can be overridden in TrieRouter this entry
    Medium · 4.2 CVE-2023-50710 < 3.11.7 3.11.7

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