Vulnerability · Published Sep 15, 2026 · Assigned by VulnCheck

CVE-2026-91969vikunja before 2.6.0 Resource Exhaustion via CSV Migration

Medium 6.5

In plain English

A medium-severity uncontrolled resource consumption in vikunja from go-vikunja. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 68.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	code.vikunja.io/api	2.6.0	GHSA-pqf9-h8g4-8gmh
Go	code.vikunja.io/api	no fix listed	GO-2026-6746

Affected products (as reported)

Vendor	Product	Versions
go-vikunja	vikunja	2.5.0 – before 2.6.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-pqf9-h8g4-8gmh) vendor-advisory
VulnCheck Advisory: vikunja before 2.6.0 Resource Exhaustion via CSV Migration third-party-advisory