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Advisory record · GHSA-g9xj-752q-xh63

Vikjuna Bypasses Webhook SSRF Protections During OpenID Connect Avatar Download

CVSS 6.4 MediumEPSS 0.0041 · 35th percentile

Published by the GitHub Advisory Database at 25 Mar 2026, 21:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
code.vikunja.io/apiGo<2.2.12.2.1
Identifiers
GHSA-g9xj-752q-xh63 · CVE-2026-33679 · GO-2026-4852
Weakness (CWE)
CWE-918
Tags
Published
25 Mar 2026
Updated
30 Mar 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vikunja versions before 2.2.1 are vulnerable. The avatar download used during OpenID Connect login does not apply the server-side request forgery protections used by the webhook system. An attacker who controls the profile picture URL at their OpenID Connect provider can make the Vikunja server send GET requests to internal or cloud metadata addresses. Upgrade to Vikunja 2.2.1 or later.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.4 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0041, the 35th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:08 UTC First seen by agentprime
  2. 31 Oct 2026, 15:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.