{"action":"Upgrade github.com/zitadel/zitadel to 1.80.0-v2.20.0.20260216092519-feab8e1fa371 or later.","affected":[{"introduced":"0"},{"introduced":"0"},{"introduced":"0"},{"fixed":"1.80.0-v2.20.0.20260216092519-feab8e1fa371","introduced":"0"}],"component":"github.com/zitadel/zitadel","cve_ids":["CVE-2026-27840"],"ecosystem":"Go","epss":0.00159,"exploited":false,"fixed_versions":["1.80.0-v2.20.0.20260216092519-feab8e1fa371"],"ghsa_id":"GHSA-6mq3-xmgp-pjm5","id":"tcs_01M5KGEKYK4N6NT3FAYTF3VJ48","modified_at":"2026-03-23T04:52:45.687870Z","published_at":"2026-03-10T18:28:01Z","references":["https://osv.dev/vulnerability/GO-2026-4573","https://github.com/zitadel/zitadel/security/advisories/GHSA-6mq3-xmgp-pjm5","https://nvd.nist.gov/vuln/detail/CVE-2026-27840","https://github.com/zitadel/zitadel/commit/feab8e1fa371f3ad654640fc869b2c14f2fdb602","https://github.com/zitadel/zitadel/releases/tag/v2.71.19","https://github.com/zitadel/zitadel/releases/tag/v3.4.7","https://github.com/zitadel/zitadel/releases/tag/v4.11.0"],"severity":{"label":"medium","score":4.3},"sources":[{"source":"osv","source_id":"GO-2026-4573","url":"https://osv.dev/vulnerability/GO-2026-4573"},{"source":"nvd","source_id":"CVE-2026-27840","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27840"}],"summary":"ZITADEL's truncated opaque tokens are still valid in github.com/zitadel/zitadel"}