{"id":"EUVD-2026-103303","enisaUuid":"edf68af1-c645-3496-91d8-7a533de01e4f","description":"Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.","datePublished":"Oct 17, 2026, 6:46:33 PM","dateUpdated":"Oct 19, 2026, 4:39:37 PM","baseScore":5.3,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99\nhttps://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation\n","aliases":"CVE-2026-111918\nGHSA-mjqg-gwhm-xr66\n","assigner":"VulnCheck","epss":0.18,"enisaIdProduct":[{"id":"7d465531-657f-3590-a63e-2bf0878eb685","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"1.0.0-rc0 \u003c2.7.0"}],"enisaIdVendor":[{"id":"084e5323-e82d-3c7e-a2bb-b99ea2027f9e","vendor":{"name":"go-vikunja"}}],"enisaIdVulnerability":[{"id":"08a910d3-ea25-3bfc-bb73-12167ba42f68","vulnerability":{"id":"GHSA-mjqg-gwhm-xr66","description":"Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.","datePublished":"Oct 17, 2026, 9:31:19 PM","dateUpdated":"Oct 17, 2026, 9:31:19 PM","baseScore":0.0,"references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-111918\nhttps://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation\n","enisa_id":"EUVD-2026-103303\n","aliases":"CVE-2026-111918\nGHSA-mjqg-gwhm-xr66\n","epss":0.0,"dataProcessed":"Oct 28, 2026, 7:03:20 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"8d4934ea-9d8d-381a-bb5a-6473649033b0","vulnerability":{"id":"CVE-2026-111918","description":"Vikunja from 1.0.0-rc0 before 2.7.0 contains an improper authorization vulnerability in RecalculateTaskPositions that allows authenticated users with zero accessible projects to write task_positions rows for all tasks instance-wide. Attackers can delete their Inbox after repointing default_project_id, then create empty-filter saved filters to persist cross-tenant references and amplify writes for denial of service.","datePublished":"Oct 17, 2026, 6:46:33 PM","dateUpdated":"Oct 19, 2026, 4:39:37 PM","status":"PUBLISHED","baseScore":5.3,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","references":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99\nhttps://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation\n","enisa_id":"EUVD-2026-103303\n","assigner":"VulnCheck","epss":0.18,"dataProcessed":"Oct 29, 2026, 7:14:01 AM","vulnerabilityProduct":[{"id":"731f285e-33c6-37ca-babe-a73f8daee8c3","product":{"name":"vikunja","vendor":{"name":"go-vikunja"}},"product_version":"1.0.0-rc0 \u003c2.7.0"}],"vulnerabilityVendor":[{"id":"d597d100-23ce-36e7-8daa-7143b82afe08","vendor":{"name":"go-vikunja"}}]}}],"enisaIdAdvisory":[]}