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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-w7jp-mf2v-8342 Vikunja: Denial of service via decompression bomb in the data import
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 15 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Go-vikunja
Go-vikunja vikunja
Vendors & Products Go-vikunja
Go-vikunja vikunja

Tue, 15 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Vikunja before 2.6.0 Denial of Service via Decompression Bomb
First Time appeared Vikunja
Vikunja vikunja
Weaknesses CWE-400
CPEs cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*
Vendors & Products Vikunja
Vikunja vikunja
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-17T19:28:09.001Z

Reserved: 2026-09-15T11:10:41.353Z

Link: CVE-2026-91979

cve-icon Vulnrichment

Updated: 2026-09-17T19:16:25.742Z

cve-icon NVD

Status : Deferred

Published: 2026-09-15T16:17:54.793

Modified: 2026-09-17T20:18:54.653

Link: CVE-2026-91979

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T16:30:18Z

Weaknesses