{"answers":{"affected":"3 open source packages ship an affected version, including code.vikunja.io/api.","exploited":"There is no known exploitation of CVE-2026-91984 in the wild and no public exploit code.","fix":"Upgrade code.vikunja.io/api to 2.6.0 or later.","what":"CVE-2026-91984 is a medium-severity missing authorization vulnerability in go-vikunja vikunja, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-91984 and fix it if it is affected.\n\nWhat it is: CVE-2026-91984 is a medium-severity missing authorization vulnerability in go-vikunja vikunja, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-91984 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- code.vikunja.io/api (Go): affected all versions; no fix listed\n- code.vikunja.io/api (Go): affected all versions; fixed in 2.6.0\n- code.vikunja.io/api (Go): affected all versions; fixed in 2.6.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-91984/ (Markdown: https://insights.sbomify.com/CVE-2026-91984/index.md)","id":"CVE-2026-91984","markdown":"https://insights.sbomify.com/CVE-2026-91984/index.md","name":"CVE-2026-91984","record":{"aliases":["GHSA-w39f-h553-h2mx","GO-2026-6755"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Vikunja task manager","requires_auth":"low_privilege","summary":"Authenticated attackers can modify task positions in other users' projects by bypassing object-level authorization checks.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":5.3,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Vikunja before 2.6.0 fails to validate that user-supplied project_view_id in task-position requests belongs to the task's project. Authenticated attackers can insert task position rows into arbitrary other tenant project views via POST or PUT task-position endpoints.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Vikunja before 2.6.0 Broken Object-Level Authorization via task-position","id":"CVE-2026-91984","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Vikunja before 2.6.0 Privilege Escalation via Link Share Hash","id":"CVE-2026-91985"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","source":"GO-2026-6755"},{"ecosystem":"Go","fixed":["2.6.0"],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":null,"source":"GHSA-w39f-h553-h2mx"},{"ecosystem":"Go","fixed":["2.6.0"],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","source":"GHSA-w39f-h553-h2mx"}],"prev":{"headline":"Vikunja before 2.6.0 API Token Scope Bypass via expand Parameter","id":"CVE-2026-91983"},"products":["vikunja"],"published":"2026-09-15","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["go-vikunja"]},"summary":"Authenticated attackers can modify task positions in other users' projects by bypassing object-level authorization checks.","url":"https://insights.sbomify.com/CVE-2026-91984/"}