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CVE-2026-28268

Vikunja vulnerability

9.8 CRITICALEPSS 0.89%
  1. Published27 Feb 2026

Description

Vikunja is an open-source self-hosted task management platform. Versions prior to 2.1.0 have a business logic vulnerability exists in the password reset mechanism of vikunja/api that allows password reset tokens to be reused indefinitely. Due to a failure to invalidate tokens upon use and a critical logic bug in the token cleanup cron job, reset tokens remain valid forever. This allows an attacker who intercepts a single reset token (via logs, browser history, or phishing) to perform a complete, persistent account takeover at any point in the future, bypassing standard authentication controls. Version 2.1.0 contains a patch for the issue.

CVSS 3.1 breakdown

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

Affected products

Vikunja< 2.1.0

Remediation

Fixed in
Vikunja≥ 2.1.0

References

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Frequently asked

Is CVE-2026-28268 being actively exploited?

CVE-2026-28268 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.89%.

How severe is CVE-2026-28268?

CVE-2026-28268 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.89% probability of exploitation.

Which products are affected by CVE-2026-28268?

Affected products include Vikunja.

How do I fix CVE-2026-28268?

Upgrade affected software to a fixed version, for example Vikunja 2.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28268 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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