{"schema":"threatline.record/2","record":{"id":"CVE-2026-111920","aliases":["GHSA-pjr3-86v4-5p7w","GO-2026-6745"],"summary":"Vikunja 2.6.0 Broken Access Control via Inherited Project Permissions","details":"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.","categories":["Libraries & packages"],"product":"vikunja","vendor":"go-vikunja","ecosystem":"Go","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111920","source_modified_at":"2026-10-18T11:17:27.926Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"vikunja","vendor":"go-vikunja","versions":[{"version":"2.6.0","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-pjr3-86v4-5p7w","source_modified_at":"2026-10-19T21:40:55.107455187Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"code.vikunja.io/api","ecosystem":"Go","purl":"pkg:golang/code.vikunja.io/api"},"ranges":[],"versions":["2.6.0"]}],"fixed_versions":[],"cvss":5.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00158,"percentile":0.04581,"score_date":"2026-10-23"},"published_at":"2026-10-17T18:46:34.636Z","modified_at":"2026-10-19T21:40:55.107455187Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111920","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-18T11:17:27.926Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-pjr3-86v4-5p7w","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-19T21:40:55.107455187Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111920","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/go-vikunja/vikunja/security/advisories/GHSA-pjr3-86v4-5p7w","tags":["exploit"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/vikunja-2.6.0-broken-access-control-via-inherited-project-permissions","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-18T11:17:24.862920Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T21:40:55.107455187Z","content_hash":"9cb2868bafffeef6d568ada22a4db61320cd684b63d77ce4ce3bf07da24cd496"}}