{"id":"CVE-2026-91970","state":"PUBLISHED","title":"Vikunja before 2.6.0 Resource Exhaustion via Planka Migration","description":"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 attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users.","publishedAt":"2026-09-15T15:18:21.449Z","updatedAt":"2026-09-15T16:02:52.721Z","severity":{"score":7.1,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["go-vikunja vikunja"],"affected":[{"vendor":"go-vikunja","product":"vikunja","packageURL":"pkg:golang/code.vikunja.io/api","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.6.0","versionType":"semver"},{"version":"2.6.0","status":"unaffected","versionType":"semver"}]}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38","https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/91xxx/CVE-2026-91970.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-91970","state":"PUBLISHED","datePublished":"2026-09-15T15:18:21.449Z","dateUpdated":"2026-09-15T16:02:52.721Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-15T11:09:54.873Z"},"containers":{"cna":{"title":"Vikunja before 2.6.0 Resource Exhaustion via Planka Migration","descriptions":[{"lang":"en","value":"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 attacker-controlled servers advertising numerous size-compliant attachments, exhausting worker memory and causing denial of service for all users."}],"affected":[{"vendor":"go-vikunja","product":"vikunja","packageURL":"pkg:golang/code.vikunja.io/api","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.6.0","versionType":"semver"},{"version":"2.6.0","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-wq92-8x3r-fm38)"},{"url":"https://www.vulncheck.com/advisories/vikunja-before-2.6.0-resource-exhaustion-via-planka-migration","name":"VulnCheck Advisory: Vikunja before 2.6.0 Resource Exhaustion via Planka Migration","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-770","lang":"en","description":"Allocation of Resources Without Limits or Throttling","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-15T15:18:21.449Z"},"datePublic":"2026-08-31T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:vikunja:vikunja:*:*:*:*:*:*:*:*","versionEndExcluding":"2.6.0"}]}]}],"credits":[{"lang":"en","value":"Zyy0530","type":"reporter"},{"lang":"en","value":"Str1ckl4nd","type":"reporter"},{"lang":"en","value":"7thParkk","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-wq92-8x3r-fm38","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T16:02:37.599981Z","id":"CVE-2026-91970","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-15T16:02:52.721Z"}}]}}}