{"answers":{"affected":"3 open source packages ship an affected version, including code.vikunja.io/api.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91980 exists.","fix":"Upgrade code.vikunja.io/api to 2.6.0 or later.","what":"CVE-2026-91980 is a medium-severity 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-2026-91980 and fix it if it is affected.\n\nWhat it is: CVE-2026-91980 is a medium-severity 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91980 exists.\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-2026-91980/ (Markdown: https://insights.sbomify.com/CVE-2026-91980/index.md)","id":"CVE-2026-91980","markdown":"https://insights.sbomify.com/CVE-2026-91980/index.md","name":"CVE-2026-91980","record":{"aliases":["GHSA-39p5-2wrr-xh29","GO-2026-6713"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Vikunja task manager","requires_auth":"low_privilege","summary":"Authenticated users can enumerate all teams and members by attaching arbitrary team IDs to projects, exposing sensitive roster data.","user_interaction":"not_required","vuln_class":"information_disclosure"},"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:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-200","name":"Exposure of Sensitive Information to an Unauthorized Actor"}],"description":"vikunja before 2.6.0 fails to validate team access when attaching teams to projects, allowing authenticated users to enumerate all teams and members. Attackers can attach arbitrary team IDs via the project teams endpoint to retrieve complete team rosters including member names and admin flags for unauthorized teams.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"vikunja before 2.6.0 Team Enumeration via Project Share","id":"CVE-2026-91980","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Vikunja before 2.6.0 User Enumeration via v2 API","id":"CVE-2026-91981"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","source":"GO-2026-6713"},{"ecosystem":"Go","fixed":["2.6.0"],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":null,"source":"GHSA-39p5-2wrr-xh29"},{"ecosystem":"Go","fixed":["2.6.0"],"introduced":["0"],"last_affected":[],"package":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","source":"GHSA-39p5-2wrr-xh29"}],"prev":{"headline":"Vikunja before 2.6.0 Denial of Service via Decompression Bomb","id":"CVE-2026-91979"},"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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["go-vikunja"]},"summary":"Authenticated users can enumerate all teams and members by attaching arbitrary team IDs to projects, exposing sensitive roster data.","url":"https://insights.sbomify.com/CVE-2026-91980/"}