{"cve":"CVE-2026-35594","nvd":{"published":"2026-04-10T16:16:32.000","modified":"2026-10-26T21:10:00.170","status":"Analyzed","description":"Vikunja is an open-source self-hosted task management platform. Prior to 2.3.0, Vikunja's link share authentication (GetLinkShareFromClaims in pkg/models/link_sharing.go) constructs authorization objects entirely from JWT claims without any server-side database validation. When a project owner deletes a link share or downgrades its permissions, all previously issued JWTs continue to grant the original permission level for up to 72 hours (the default service.jwtttl). This vulnerability is fixed in 2.3.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N","score":6.5},"cwes":["CWE-613"],"references":["https://github.com/go-vikunja/vikunja/commit/379d8a5c19334ffe4846003f590e202c31a75479","https://github.com/go-vikunja/vikunja/pull/2581","https://github.com/go-vikunja/vikunja/releases/tag/v2.3.0","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-96q5-xm3p-7m84"],"products":["vikunja:vikunja"],"source":"nvd","synced_at":"2026-10-26T21:38:48.864438205+00:00"},"epss":{"cve":"CVE-2026-35594","score":0.00305,"percentile":0.2307,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-96q5-xm3p-7m84","url":"https://osv.dev/vulnerability/GHSA-96q5-xm3p-7m84","summary":"Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade","modified":"2026-07-21T13:55:25Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["<2.3.0"],"fixed":["2.3.0"]}]},{"id":"GO-2026-5276","url":"https://osv.dev/vulnerability/GO-2026-5276","summary":"Vikunja: Link Share JWT tokens remain valid for 72 hours after share deletion or permission downgrade in code.vikunja.io/api","modified":"2026-06-25T19:45:23.239344473Z","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."]}