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CVE-2026-27819

Vikunja path traversal

7.2 HIGHPublic exploitEPSS 0.88%
  1. Published25 Feb 2026

Description

Vikunja is an open-source self-hosted task management platform. Prior to version 2.0.0, the restoreConfig function in vikunja/pkg/modules/dump/restore.go of the go-vikunja/vikunja repository fails to sanitize file paths within the provided ZIP archive. A maliciously crafted ZIP can bypass the intended extraction directory to overwrite arbitrary files on the host system. Additionally, we’ve discovered that a malformed archive triggers a runtime panic, crashing the process immediately after the database has been wiped permanently. The application trusts the metadata in the ZIP archive. It uses the Name attribute of the zip.File struct directly in os.OpenFile calls without validation, allowing files to be written outside the intended directory. The restoration logic assumes a specific directory structure within the ZIP. When provided with a "minimalist" malicious ZIP, the application fails to validate the length of slices derived from the archive contents. Specifically, at line 154, the code attempts to access an index of len(ms)-2 on an insufficiently populated slice, triggering a panic. Version 2.0.0 fixes the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredHigh
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected products

Vikunja< 2.0.0

Remediation

Fixed in
Vikunja≥ 2.0.0

References

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Frequently asked

Is CVE-2026-27819 being actively exploited?

CVE-2026-27819 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.88%.

How severe is CVE-2026-27819?

CVE-2026-27819 has a CVSS 3.1 base score of 7.2, rated high. EPSS estimates a 0.88% probability of exploitation.

Which products are affected by CVE-2026-27819?

Affected products include Vikunja.

How do I fix CVE-2026-27819?

Upgrade affected software to a fixed version, for example Vikunja 2.0.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.