{"cve":"CVE-2026-33315","nvd":{"published":"2026-03-24T15:16:35.227","modified":"2026-06-17T10:37:18.563","status":"Analyzed","description":"Vikunja is an open-source self-hosted task management platform. Prior to version 2.2.0, the Caldav endpoint allows login using Basic Authentication, which in turn allows users to bypass the TOTP on 2FA-enabled accounts. The user can then access standard project information that would normally be protected behind 2FA (if enabled), such as project name, description, etc. Version 2.2.0 patches the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-288"],"references":["https://github.com/go-vikunja/vikunja/commit/cdf5d30a425d032f749b78b98b828f25ad882615","https://github.com/go-vikunja/vikunja/security/advisories/GHSA-47cr-f226-r4pq","https://vikunja.io/changelog/vikunja-v2.2.0-was-released"],"products":["vikunja:vikunja"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33315","score":0.00314,"percentile":0.24347,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-47cr-f226-r4pq","url":"https://osv.dev/vulnerability/GHSA-47cr-f226-r4pq","summary":"Vikunja has a 2FA Bypass via Caldav Basic Auth","modified":"2026-03-25T21:04:24.696586Z","packages":[{"ecosystem":"Go","name":"code.vikunja.io/api","purl":"pkg:golang/code.vikunja.io/api","ranges":["<=2.1.0"],"fixed":[]}]},{"id":"GO-2026-4794","url":"https://osv.dev/vulnerability/GO-2026-4794","summary":"Vikunja has a 2FA Bypass via Caldav Basic Auth in code.vikunja.io/api","modified":"2026-03-23T18:45:22.868622Z","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."]}