Skip to content

chore(deps): update module github.com/go-chi/chi/v5 to v5.2.2 [security] #1011

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom
Open
renovate-sh-app wants to merge 1 commit into
base: main
Choose a base branch
from
Open

chore(deps): update module github.com/go-chi/chi/v5 to v5.2.2 [security] #1011

renovate-sh-app wants to merge 1 commit into from

Conversation

@renovate-sh-app
Copy link

@renovate-sh-app renovate-sh-app bot commented Oct 23, 2025 •
edited
Loading

This PR contains the following updates:

Package Change Age Confidence
github.com/go-chi/chi/v5 v5.2.1 -> v5.2.2 age confidence

Warning

Some dependencies could not be looked up. Check the Dependency Dashboard for more information.

GitHub Vulnerability Alerts

GHSA-vrw8-fxc6-2r93

Summary

The RedirectSlashes function in middleware/strip.go is vulnerable to host header injection which leads to open redirect.

We consider this a lower-severity open redirect, as it can't be exploited from browsers or email clients (requires manipulation of a Host header).

Details

The RedirectSlashes method uses the Host header to construct the redirectURL at this line https://github.com/go-chi/chi/blob/master/middleware/strip.go#L55

The Host header can be manipulated by a user to be any arbitrary host. This leads to open redirect when using the RedirectSlashes middleware

PoC

Create a simple server which uses the RedirectSlashes middleware

package main

import (
	"fmt"
	"net/http"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware" // Import the middleware package
)

func main() {
	// Create a new Chi router
	r := chi.NewRouter()

	// Use the built-in RedirectSlashes middleware
	r.Use(middleware.RedirectSlashes) // Use middleware.RedirectSlashes

	// Define a route handler
	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
		// A simple response
		w.Write([]byte("Hello, World!"))
	})

	// Start the server
	fmt.Println("Starting server on :8080")
	http.ListenAndServe(":8080", r)
}

Run the server go run main.go

Once the server is running, send a request that will trigger the RedirectSlashes function with an arbitrary Host header
curl -iL -H "Host: example.com" http://localhost:8080/test/

Observe that the request will be redirected to example.com

curl -L -H "Host: example.com" http://localhost:8080/test/

<!doctype html>
<html>
<head>
    <title>Example Domain</title>

    <meta charset="utf-8" />
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <style type="text/css">
    body {
        background-color: #f0f0f2;
        margin: 0;
        padding: 0;
        font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
... snipped ...

Without the host header, the response is returned from the test server

curl -L http://localhost:8080/test/

404 page not found

Impact

An open redirect vulnerability allows attackers to trick users into visiting malicious sites. This can lead to phishing attacks, credential theft, and malware distribution, as users trust the application’s domain while being redirected to harmful sites.

Potential mitigation

It seems that the purpose of the RedirectSlashes function is to redirect within the same application. In that case r.RequestURI can be used instead of r.Host by default. If there is a use case to redirect to a different host, a flag can be added to use the Host header instead. As this flag will be controlled by the developer they will make the decision of allowing redirects to arbitrary hosts based on their judgement.

chi Allows Host Header Injection which Leads to Open Redirect in RedirectSlashes

GHSA-vrw8-fxc6-2r93 / GO-2025-3770

More information

Details

Summary

The RedirectSlashes function in middleware/strip.go is vulnerable to host header injection which leads to open redirect.

We consider this a lower-severity open redirect, as it can't be exploited from browsers or email clients (requires manipulation of a Host header).

Details

The RedirectSlashes method uses the Host header to construct the redirectURL at this line https://github.com/go-chi/chi/blob/master/middleware/strip.go#L55

The Host header can be manipulated by a user to be any arbitrary host. This leads to open redirect when using the RedirectSlashes middleware

PoC

Create a simple server which uses the RedirectSlashes middleware

package main

import (
	"fmt"
	"net/http"

	"github.com/go-chi/chi/v5"
	"github.com/go-chi/chi/v5/middleware" // Import the middleware package
)

func main() {
	// Create a new Chi router
	r := chi.NewRouter()

	// Use the built-in RedirectSlashes middleware
	r.Use(middleware.RedirectSlashes) // Use middleware.RedirectSlashes

	// Define a route handler
	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
		// A simple response
		w.Write([]byte("Hello, World!"))
	})

	// Start the server
	fmt.Println("Starting server on :8080")
	http.ListenAndServe(":8080", r)
}

Run the server go run main.go

Once the server is running, send a request that will trigger the RedirectSlashes function with an arbitrary Host header
curl -iL -H "Host: example.com" http://localhost:8080/test/

Observe that the request will be redirected to example.com

curl -L -H "Host: example.com" http://localhost:8080/test/

<!doctype html>
<html>
<head>
    <title>Example Domain</title>

    <meta charset="utf-8" />
    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <style type="text/css">
    body {
        background-color: #f0f0f2;
        margin: 0;
        padding: 0;
        font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
... snipped ...

Without the host header, the response is returned from the test server

curl -L http://localhost:8080/test/

404 page not found
Impact

An open redirect vulnerability allows attackers to trick users into visiting malicious sites. This can lead to phishing attacks, credential theft, and malware distribution, as users trust the application’s domain while being redirected to harmful sites.

Potential mitigation

It seems that the purpose of the RedirectSlashes function is to redirect within the same application. In that case r.RequestURI can be used instead of r.Host by default. If there is a use case to redirect to a different host, a flag can be added to use the Host header instead. As this flag will be controlled by the developer they will make the decision of allowing redirects to arbitrary hosts based on their judgement.

Severity

  • CVSS Score: 5.1 / 10 (Medium)
  • Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

References

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

Host Header Injection which Leads to Open Redirect in RedirectSlashes in github.com/go-chi/chi

GHSA-vrw8-fxc6-2r93 / GO-2025-3770

More information

Details

Host Header Injection which Leads to Open Redirect in RedirectSlashes in github.com/go-chi/chi

Severity

Unknown

References

This data is provided by OSV and the Go Vulnerability Database (CC-BY 4.0).

Release Notes

go-chi/chi (github.com/go-chi/chi/v5)

v5.2.2

Compare Source

What's Changed
Security fix
  • Fixes GHSA-vrw8-fxc6-2r93 - "Host Header Injection Leads to Open Redirect in RedirectSlashes" commit
    • a lower-severity Open Redirect that can't be exploited in browser or email client, as it requires manipulation of a Host header
    • reported by Anuraag Baishya, @​anuraagbaishya. Thank you!
New Contributors

Full Changelog: go-chi/chi@v5.2.1...v5.2.2

Configuration

📅 Schedule: Branch creation - "" (UTC), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

  • If you want to rebase/retry this PR, check this box

This PR has been generated by Renovate Bot.

@renovate-sh-app
chore(deps): update module github.com/go-chi/chi/v5 to v5.2.2 [security]
a4813c4 
| datasource | package                  | from   | to     |
| ---------- | ------------------------ | ------ | ------ |
| go         | github.com/go-chi/chi/v5 | v5.2.1 | v5.2.2 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>
@renovate-sh-app renovate-sh-app bot enabled auto-merge (squash) October 23, 2025 12:17
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Reviewers

No reviews

Assignees

No one assigned

Labels

automerge-security-update severity:UNKNOWN

Projects

None yet

Milestone

No milestone

Development

Successfully merging this pull request may close these issues.

0 participants