CVE-2026-91969

MEDIUM 6.5

vikunja before 2.6.0 Resource Exhaustion via CSV Migration

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the POST /api/v2/migration/csv/migrate endpoint that fails to limit parsed row cardinality. Authenticated attackers can upload multipart CSV files with millions of tiny records to exhaust process memory and terminate the API service.

CWE	CWE-400
Vendor	go-vikunja
Product	vikunja
Published	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

go-vikunja / vikunja

2.5.0 < 2.6.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/go-vikunja/vikunja/security/advisories/GHSA-pqf9-h8g4-8gmh vulncheck.com: https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-csv-migration

Credits

🔍 Zyy0530 🔍 Str1ckl4nd 🔍 7thParkk