HTTP Error 403: No Valid Crumb Was Included in the Request is an error commonly encountered in Jenkins, particularly during integration with platforms like GitHub, GitLab, and Bitbucket. This error occurs due to the Crumb Issuer security mechanism in Jenkins, which prevents Cross-Site Request Forgery (CSRF) attacks. When the crumb (CSRF token) is missing or invalid, Jenkins returns an HTTP 403 error, blocking the request.
In this article, we will explore the causes and solutions for this error, especially in Jenkins pipelines and integrations with source control systems.
Table of Contents
What Causes HTTP Error 403: No Valid Crumb Was Included in the Request?
- Crumb Issuer Misconfiguration
The Crumb Issuer in Jenkins is responsible for generating CSRF tokens (crumbs) for authenticated users. If this security feature is not properly configured, it can lead to the HTTP Error 403: No Valid Crumb Was Included in the Request Jenkins error, especially when performing actions that require form submissions or triggering builds. - Missing CSRF Token in API Requests
When integrating Jenkins with tools like GitHub, GitLab, or Bitbucket, API requests may fail if they do not include the necessary CSRF token. This is a common issue when using Jenkins webhooks or making API calls that require authentication, resulting in Jenkins HTTP Error 403 No Valid Crumb Was Included in the Request. - Login Issues
The HTTP Error 403: No Valid Crumb Was Included in the Request Jenkins Login error can occur if the user session is invalid or expired, and Jenkins cannot verify the authenticity of the request due to the missing crumb.
Common Scenarios for HTTP Error 403: No Valid Crumb Was Included in the Request
1. Jenkins HTTP Error 403: No Valid Crumb Was Included in the Request Bitbucket
When integrating Jenkins with Bitbucket for continuous integration, you might encounter HTTP Error 403 No Valid Crumb Was Included in the Request Jenkins Bitbucket if the crumb token is not passed with the webhook request or during API communication. This issue can be resolved by ensuring the proper authentication and crumb configuration in Jenkins.
2. Jenkins HTTP Error 403: No Valid Crumb Was Included in the Request GitLab
Similarly, during Jenkins and GitLab integration, this error may occur due to missing CSRF tokens in API requests or webhooks. This can block certain actions such as triggering builds or deploying code.
3. Jenkins HTTP Error 403: No Valid Crumb Was Included in the Request GitHub
If you’re using Jenkins with GitHub, you might encounter the HTTP Error 403 No Valid Crumb Was Included in the Request GitHub error when trying to trigger builds or deploy code from GitHub repositories. This typically happens when the crumb is not validated, or the CSRF protection in Jenkins is blocking unauthenticated requests.
How to Fix HTTP Error 403: No Valid Crumb Was Included in the Request
1. Disable or Configure Crumb Issuer
To fix Jenkins HTTP Error 403 No Valid Crumb Was Included in the Request, you can either disable or properly configure the Crumb Issuer in Jenkins:
- Go to Manage Jenkins > Configure Global Security.
- Find the CSRF Protection section.
- If you trust your environment, you can disable CSRF protection by unchecking Prevent Cross Site Request Forgery exploits.
- Alternatively, you can configure the Crumb Issuer to allow API requests or form submissions to include the correct crumb tokens.
2. Add Crumb Token to API Requests
If you’re using Jenkins in conjunction with Bitbucket, GitLab, or GitHub, ensure that API requests include the crumb token. This can be done by adding the Jenkins-Crumb header to your requests, or by using Jenkins’ Remote Access API to automatically include the crumb.
For example, to obtain a crumb in a request:
curl -u "username:token" "http://jenkins-url/crumbIssuer/api/json"3. Use Valid Authentication Credentials
Ensure that you are logged in with a valid session. If you’re encountering Jenkins Login HTTP Error 403 No Valid Crumb Was Included in the Request, log out of Jenkins and log back in to refresh your session and obtain a new crumb token.
4. Update Jenkins and Plugins
Sometimes, outdated versions of Jenkins or its plugins can cause compatibility issues with the Crumb Issuer. Make sure you’re using the latest version of Jenkins and related plugins to avoid unnecessary errors like HTTP Error 403 No Valid Crumb Was Included in the Request Jenkins GitLab or Jenkins Bitbucket errors.
Related Questions and Answers
Conclusion
The HTTP Error 403 No Valid Crumb Was Included in the Request in Jenkins is a security-related error tied to CSRF protection. It can prevent legitimate requests from being processed if the necessary crumb tokens are not included. By configuring Jenkins’ Crumb Issuer, adding crumb tokens to API requests, or adjusting your CSRF protection settings, you can resolve this issue and ensure smooth integrations with GitHub, GitLab, Bitbucket, and other platforms.
