Summaryinfo

A vulnerability labeled as critical has been found in go-vikunja vikunja up to 2.2.0. The impacted element is the function DownloadImage of the file pkg/utils/avatar.go of the component Image Parser. Executing a manipulation can lead to server-side request forgery. This vulnerability is registered as CVE-2026-33679. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical was found in go-vikunja vikunja up to 2.2.0. This vulnerability affects the function DownloadImage of the file pkg/utils/avatar.go of the component Image Parser. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, the `DownloadImage` function in `pkg/utils/avatar.go` uses a bare `http.Client{}` with no SSRF protection when downloading user avatar images from the OpenID Connect `picture` claim URL. An attacker who controls their OIDC profile picture URL can force the Vikunja server to make HTTP GET requests to arbitrary internal or cloud metadata endpoints. This bypasses the SSRF protections that are correctly applied to the webhook system. Version 2.2.1 patches the issue.

The advisory is available at github.com. This vulnerability was named CVE-2026-33679 since 03/23/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit.

Upgrading to version 2.2.1 eliminates this vulnerability. The upgrade is hosted for download at vikunja.io. Applying the patch 363aa6642352b08fc8bc6aaff2f3a550393af1cf is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• go-vikunja

Name

• vikunja

Version

• 2.0
• 2.1
• 2.2.0

License

• open-source

Website

• Product: https://github.com/go-vikunja/vikunja/

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