CVE-2026-123493: Security vulnerability

Published Nov 8, 2026
·
Updated

Vikunja from 2.4.0 before 2.7.1 contains an authentication bypass vulnerability that allows disabled or locked users to retain access through API tokens owned by their bot users. Because token validation only checks the bot's own status, attackers holding pre-minted bot tokens can keep reading and modifying shared projects via the HTTP API, CalDAV, MCP and feeds.

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Vikunja to a version that resolves this vulnerability.

    Fixed in 2.7.1

Event History

Nov 8, 2026
CVE Published
via NVD·02:16 AM
Data Sourced
via NVD·02:16 AM
DescriptionSeverityWeakness

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