{"cve":"CVE-2026-111918","nvd":{"published":"2026-10-17T19:16:34.403","modified":"2026-10-19T21:14:14.150","status":"Deferred","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.","cvss_v4":{"vector":"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","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","score":5.4},"cwes":["CWE-863"],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-fprf-r6rv-xg99","https://www.vulncheck.com/advisories/vikunja-1.0.0-rc0-before-2.7.0-cross-tenant-task-position-writes-via-saved-filter-creation"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:56:58.798400159+00:00"},"epss":{"cve":"CVE-2026-111918","score":0.00176,"percentile":0.07102,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-fprf-r6rv-xg99","url":"https://osv.dev/vulnerability/GHSA-fprf-r6rv-xg99","summary":"Vikunja: Saved filter creation with an empty filter string recalculates task positions across all tenants","modified":"2026-10-19T21:40:46.828122007Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":[">=1.0.0-rc0 <=2.6.0"],"fixed":[]}]},{"id":"GO-2026-6731","url":"https://osv.dev/vulnerability/GO-2026-6731","summary":"Vikunja: Saved filter creation with an empty filter string recalculates task positions across all tenants in code.vikunja.io/api","modified":"2026-10-19T21:40:46.828122007Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}