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Vulnerability record · CVE-2026-91969 · published 15 September 2026

CVE-2026-91969: Uncontrolled resource consumption vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.44% · top 64.6% CWE-400 · Uncontrolled resource consumption Deferred
7.1CVSS 4.0 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Sep 2026Last modified by NVD

Description

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-91969), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.