CVE-2026-33313: Vikunja has an IDOR in Task Comments Allows Reading Arbitrary Comments

March 20, 2026

An authenticated user can read any task comment by ID, regardless of whether they have access to the task the comment belongs to, by substituting the task ID in the API URL with a task they do have access to.

References

github.com/advisories/GHSA-mr3j-p26x-72x4
github.com/go-vikunja/vikunja
github.com/go-vikunja/vikunja/commit/bc6d843ed4df82a6c89f10aa676a7a33d27bf2fd
github.com/go-vikunja/vikunja/security/advisories/GHSA-mr3j-p26x-72x4
nvd.nist.gov/vuln/detail/CVE-2026-33313

Code Behaviors & Features

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