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Vulnerabilities

Vulnerability · CVE-2026-33678

Vikunja is an open-source self-hosted task management platform.

Published Mar 24, 2026 · catalog updated Jun 17, 2026 · Vikunja is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2026-33678. EPSS is 0.38%. Act only if a listed version of Vikunja is an open-source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Vikunja is an open-source).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Advisory link
Affected products
cpe vikunja/vikunja

Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, queries attachments by ID only ( ), ignoring the task ID from the URL path. The permission check in validates access to the task specified in the URL, but loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the system by providing their own accessible task ID with a target attachment ID. Attachment IDs are sequential integers, making enumeration trivial. Version 2.2.1 patches the issue.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vikunja/vikunjaversion unspecified

How to fix CVE-2026-33678

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33678. EPSS is 0.38%. Act only if a listed version of Vikunja is an open-source is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-639: Authorization Bypass Through User-Controlled Key. EPSS 0.38%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 24, 2026 · NIST NVD

    Detected

    Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, queries attachments by ID only ( ), ignoring the task ID from the URL path. The permission check in validates access to the task specified in the URL, but loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the sys

  2. Jun 17, 2026 · NIST NVD

    Updated

    Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, queries attachments by ID only ( ), ignoring the task ID from the URL path. The permission check in validates access to the task specified in the URL, but loads a different attachment that may belong to a task in another project. This allows any authenticated user to download or delete any attachment in the sys

Sources

  • CVE.orgVulnerability recordCVE-2026-33678

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33678

    30-day exploitation probability 0.4%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33678

    Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.1, queries attachments by ID only ( ), ignoring the task ID from the URL path. The permission check in validates access to the task specified i

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.