{"action":"Upgrade github.com/zitadel/zitadel to 4.15.3 or later.","affected":[{"fixed":"4.15.3","introduced":"0"}],"component":"github.com/zitadel/zitadel","cve_ids":["CVE-2026-56668"],"ecosystem":"Go","epss":0.00413,"exploited":false,"fixed_versions":["4.15.3"],"ghsa_id":"GHSA-vrh8-c9cm-wh8v","id":"tcs_01M5KFPM1TPFD41JPYDCX3V62K","modified_at":"2026-09-17T17:40:44.830526910Z","published_at":"2026-09-14T21:28:23Z","references":["https://osv.dev/vulnerability/GHSA-vrh8-c9cm-wh8v","https://github.com/zitadel/zitadel/security/advisories/GHSA-vrh8-c9cm-wh8v","https://nvd.nist.gov/vuln/detail/CVE-2026-56668","https://github.com/zitadel/zitadel/commit/e2886a61670ca8fd41c9434f87036546e5620bcc","https://github.com/zitadel/zitadel","https://github.com/zitadel/zitadel/releases/tag/v4.15.3"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GHSA-vrh8-c9cm-wh8v","url":"https://osv.dev/vulnerability/GHSA-vrh8-c9cm-wh8v"}],"summary":"ZITADEL: Unauthorized Token Privilege Escalation in OAuth2 Token Exchange"}