CVE-2026-35602: CWE-770: Allocation of Resources Without Limits or Throttling in go-vikunja vikunja
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoint uses the attacker-controlled Size field from the JSON metadata inside the import zip instead of the actual decompressed file content length for the file size enforcement check. By setting Size to 0 in the JSON while including large compressed file entries in the zip, an attacker bypasses the configured maximum file size limit. This vulnerability is fixed in 2.3.0.
AI Analysis
Technical Summary
CVE-2026-35602 is a resource allocation vulnerability (CWE-770) in the open-source task management platform Vikunja before version 2.3.0. The file import endpoint relies on the attacker-controlled Size field from JSON metadata inside import zip files to enforce file size limits rather than the actual decompressed file content length. By setting Size to 0 while including large compressed files, an attacker can bypass the maximum file size restriction, leading to uncontrolled resource consumption. This vulnerability has a CVSS 3.1 base score of 5.4 (medium severity) and does not affect confidentiality but impacts integrity and availability. The vulnerability is resolved in Vikunja 2.3.0.
Potential Impact
Exploitation allows attackers with limited privileges to bypass file size restrictions during import, potentially causing excessive resource consumption and denial of service. There is no direct confidentiality impact, but integrity and availability can be affected due to resource exhaustion.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this vulnerability is fixed. Since the vendor advisory confirms the issue is resolved in 2.3.0, applying this official fix is the recommended remediation. No additional mitigations are specified.
CVE-2026-35602: CWE-770: Allocation of Resources Without Limits or Throttling in go-vikunja vikunja
Description
Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, the Vikunja file import endpoint uses the attacker-controlled Size field from the JSON metadata inside the import zip instead of the actual decompressed file content length for the file size enforcement check. By setting Size to 0 in the JSON while including large compressed file entries in the zip, an attacker bypasses the configured maximum file size limit. This vulnerability is fixed in 2.3.0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-35602 is a resource allocation vulnerability (CWE-770) in the open-source task management platform Vikunja before version 2.3.0. The file import endpoint relies on the attacker-controlled Size field from JSON metadata inside import zip files to enforce file size limits rather than the actual decompressed file content length. By setting Size to 0 while including large compressed files, an attacker can bypass the maximum file size restriction, leading to uncontrolled resource consumption. This vulnerability has a CVSS 3.1 base score of 5.4 (medium severity) and does not affect confidentiality but impacts integrity and availability. The vulnerability is resolved in Vikunja 2.3.0.
Potential Impact
Exploitation allows attackers with limited privileges to bypass file size restrictions during import, potentially causing excessive resource consumption and denial of service. There is no direct confidentiality impact, but integrity and availability can be affected due to resource exhaustion.
Mitigation Recommendations
Upgrade Vikunja to version 2.3.0 or later, where this vulnerability is fixed. Since the vendor advisory confirms the issue is resolved in 2.3.0, applying this official fix is the recommended remediation. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-03T21:25:12.162Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69d9d9751cc7ad14da3f8740
Added to database: 4/11/2026, 5:17:41 AM
Last enriched: 4/18/2026, 2:22:48 PM
Last updated: 5/10/2026, 1:33:50 PM
Views: 84
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