Published : Aug. 2, 2026, 1:16 p.m. | 10 hours, 26 minutes ago
Description :Vikunja versions 0.22.0 through 2.3.0 fail to validate the principal type in API token management. Because user IDs and link-share IDs are independent numeric sequences and both resolve through a generic web.Auth.GetID() interface, a link-share JWT whose numeric ID equals a target user’s ID is treated as that user by the /api/v1/tokens endpoints. An authenticated attacker can obtain a target’s numeric user ID via authenticated user search, then create link shares on an attacker-writable project until the link-share sequence reaches that value, and use the resulting link-share JWT to list, create, and delete the target user’s API tokens (including issuing a new token with attacker-chosen scopes under the target’s permissions). Fixed in version 2.4.0.
Severity: 8.1 | HIGH
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Google Gemini (gemini-2.5-flash) • CVE: CVE-2026-68581
N/A
Upon suspicion or confirmation of compromise related to CVE-2026-68581, immediate containment and investigation steps are critical.
First, isolate all potentially affected systems from the primary network. This can be achieved by moving them to a quarantine VLAN, disabling their network interfaces, or applying host-based firewall rules to block all inbound and outbound connections except for essential management access.
Second, create forensic images of the system memory and disk drives for critical affected systems. This preserves evidence for root cause analysis and incident investigation.
Third, review system logs, application logs, and network device logs for any indicators of compromise (IOCs) such as unusual process execution, unauthorized file modifications, unexpected network connections, or new user account creation.
Fourth, force a password reset for any administrative or service accounts that had access to or were operating on the compromised systems. Implement multi-factor authentication if not already in place.
Fifth, activate your organization's incident response plan and notify relevant internal stakeholders, including security teams, IT operations, legal,