Description
Vikunja before 2.7.1 contains a resource exhaustion vulnerability in the vikunja-file ZIP importer that allows authenticated users to consume CPU and memory by uploading archives with excessive entries. Attackers can upload export ZIPs containing many empty or non-files/ entries that bypass the per-entry caps, forcing scanArchive to process every entry twice.
Published: 2026-11-08
Score: 7.1 High
EPSS: n/a
KEV: No
Impact: Denial of Service due to resource exhaustion
Action: Patch
AI Analysis

Impact

The vulnerability allows authenticated users to upload ZIP archives with a vast number of entries, leading to excessive CPU and memory consumption by the import process. This excessive load can overwhelm the system, potentially causing application unavailability. The weakness is a classic resource exhaustion flaw, classified under CWE-770.

Affected Systems

Vikunja (go-vikunja:vikunja) prior to version 2.7.1 is affected. The vulnerability exists in all releases up to and including 2.7.0 and earlier, with no mitigations provided in those versions.

Risk and Exploitability

The CVSS score of 7.1 categorizes the issue as high severity. No EPSS score is available, and the vulnerability is not listed in the CISA KEV catalog. Exploitation requires authentication and the ability to upload ZIP files; an attacker can construct export archives with many empty or metadata entries that bypass per-entry limits, forcing the import code to process every entry twice. The high resource demand indicates a high likelihood of service disruption if an active user account is compromised or misused.

Generated by OpenCVE AI on November 8, 2026 at 02:24 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the latest Vikunja 2.7.1 or newer release to remove the flaw
  • Configure the application or web server to reject ZIP archives exceeding a safe number of entries or a defined size limit
  • Implement monitoring and throttling of authenticated upload traffic to detect or prevent resource exhaustion

Generated by OpenCVE AI on November 8, 2026 at 02:24 UTC.

Tracking

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Advisories

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History

Sun, 08 Nov 2026 01:45:00 +0000

Type Values Removed Values Added
Description Vikunja before 2.7.1 contains a resource exhaustion vulnerability in the vikunja-file ZIP importer that allows authenticated users to consume CPU and memory by uploading archives with excessive entries. Attackers can upload export ZIPs containing many empty or non-files/ entries that bypass the per-entry caps, forcing scanArchive to process every entry twice.
Title Vikunja before 2.7.1 Resource Exhaustion via Vikunja-File ZIP Import
First Time appeared Vikunja
Vikunja vikunja
Weaknesses CWE-770
CPEs cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*
Vendors & Products Vikunja
Vikunja vikunja
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Subscriptions

Vikunja Vikunja
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-08T01:37:28.063Z

Reserved: 2026-11-06T00:47:14.649Z

Link: CVE-2026-123516

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-08T02:16:40.543

Modified: 2026-11-08T02:16:40.673

Link: CVE-2026-123516

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-08T02:45:17Z

Weaknesses
  • CWE-770

    Allocation of Resources Without Limits or Throttling