What’s Vulnerable › Vulnerabilities

CVE-2026-33679: Vikunja has SSRF via OpenID Connect Avatar Download that Bypasses Webhook SSRF Protections

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-24 · updated 2026-06-17
• Weakness: CWE-918

Description

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.

Affected products

• go-vikunja vikunja: before 2.2.1 — fixed in 2.2.1

How to fix

Upgrade to a fixed version: go-vikunja vikunja 2.2.1. Check the vendor advisory for mitigations.

References

• https://github.com/go-vikunja/vikunja/commit/363aa6642352b08fc8bc6aaff2f3a550393af1cf
• https://github.com/go-vikunja/vikunja/security/advisories/GHSA-g9xj-752q-xh63
• https://vikunja.io/changelog/vikunja-v2.2.2-was-released

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