{"cve":"CVE-2026-111920","nvd":{"published":"2026-10-17T19:16:34.680","modified":"2026-10-19T21:02:51.987","status":"Deferred","description":"Vikunja 2.6.0 contains a broken access control flaw in getProjectAccessForUser (pkg/models/project_access.go), which resolves a user's effective project permission as the maximum over the project tree, silently overriding explicit lower-permission shares on sub-projects. A collaborator with write access on a parent project but read-only access to a child project can modify the child project's tasks and content.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/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:N","score":4.3},"cwes":["CWE-269"],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w","https://www.vulncheck.com/advisories/vikunja-2.6.0-broken-access-control-via-inherited-project-permissions","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w"],"products":[],"source":"nvd","synced_at":"2026-10-21T03:56:58.798400159+00:00"},"epss":{"cve":"CVE-2026-111920","score":0.00191,"percentile":0.08668,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-pjr3-86v4-5p7w","url":"https://osv.dev/vulnerability/GHSA-pjr3-86v4-5p7w","summary":"Vikunja: Explicit lower-permission share on a sub-project is silently overridden by an inherited parent permission (broken access control / privilege-management regression in v2.6.0)","modified":"2026-10-19T21:40:55.107455187Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["2.6.0"],"fixed":[]}]},{"id":"GO-2026-6745","url":"https://osv.dev/vulnerability/GO-2026-6745","summary":"Vikunja: Explicit lower-permission share on a sub-project is silently overridden by an inherited parent permission (broken access control / privilege-management regression in v2.6.0) in code.vikunja.io/api","modified":"2026-10-19T21:40:55.107455187Z","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."]}