{"id":"CVE-2026-91970","title":"Vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs","summary":"Vikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs. Authenticated attackers can submit migration requests pointing to atta…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-770"],"vendor":"go-vikunja","product":"vikunja","affected":["vikunja < 2.6.0"],"published":"2026-09-15","updated":"2026-09-16","sourceUpdated":"2026-09-16T19:49:18.987","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91970","references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration","label":"disclosure@vulncheck.com"},{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-15T16:02:37.599981Z"},"ingestedAt":"2026-09-15T15:39:12.913Z","epss":0.00368,"epssPercentile":0.30515,"slug":"CVE-2026-91970","body":"## Overview\n\nVikunja versions before 2.6.0 contain a resource exhaustion vulnerability in the Planka migrator that fails to enforce aggregate memory budgets during migration jobs. Authenticated attackers can submit migration requests pointing to attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":204285,"id":"CVE-2026-91970","ts":1789490446193,"field":"exploit_available","old":"false","new":"true"}]}