{"id":"CVE-2026-111920","revision":"a41c8f60956c42b6b2cce6ee7af5fe8b","records":[{"revision":"a41c8f60956c42b6b2cce6ee7af5fe8b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-111920","aliases":[],"title":"Vikunja 2.6.0 Broken Access Control via Inherited Project Permissions","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.","state":0,"publishedAt":"2026-10-17T18:46:34.636+00:00","modifiedAt":"2026-10-18T11:17:27.926+00:00","affected":[{"ecosystem":"Vendor product","name":"vikunja","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"go-vikunja\",\n                    \"product\": \"vikunja\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:golang/code.vikunja.io/api\",\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","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,"severity":"MEDIUM"},{"system":"CVSS 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,"severity":"MEDIUM"}],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-111920","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-111920","identifiers":["CVE-2026-111920"]},"retained":false,"historicalAffected":[]}],"coverage":[]}