What is CVE-2026-91979?

CVE-2026-91979 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-15.

How severe is CVE-2026-91979?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Go-Vikunja Vikunja

CVE-2026-91979

Vikunja before 2.6.0 fails to limit archive expansion during data import, allowing authenticated users to cause denial of service. Attackers can upload highly compressed files that expand to tens of gigabytes in memory and disk, exhausting server resources and crashing the instance.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Go-vikunja Vikunja

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-91979?: CVE-2026-91979 is a medium-severity vulnerability in Go-Vikunja Vikunja, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-15.
How severe is CVE-2026-91979?: Medium severity. CVSS v3 base score is 6.5 out of 10.