{"action":"Upgrade github.com/nats-io/jwt to 1.1.0 or later.","affected":[{"fixed":"1.1.0","introduced":"0"}],"component":"github.com/nats-io/jwt","cve_ids":["CVE-2020-26521"],"ecosystem":"Go","epss":0.02157,"exploited":false,"fixed_versions":["1.1.0"],"ghsa_id":"GHSA-h2fg-54x9-5qhq","id":"tcs_01M5KFBQ3QPM2V3QB8M7EQD5BM","modified_at":"2026-09-10T03:49:12.147242460Z","published_at":"2022-02-11T23:43:13Z","references":["https://osv.dev/vulnerability/GHSA-h2fg-54x9-5qhq","https://github.com/nats-io/jwt/security/advisories/GHSA-h2fg-54x9-5qhq","https://nvd.nist.gov/vuln/detail/CVE-2020-26521","https://github.com/nats-io/jwt/pull/107","https://github.com/nats-io/nats-server/commit/9ff8bcde2e46009e98bd9e88f598af355f62c168","https://advisories.nats.io/CVE/CVE-2020-26521.txt","https://github.com/nats-io/jwt","https://github.com/nats-io/nats-server/commits/master","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VT67XCLIIBYRT762SVFBYFFTQFVSM3SI","https://pkg.go.dev/vuln/GO-2022-0402","http://www.openwall.com/lists/oss-security/2020/11/02/2"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GHSA-h2fg-54x9-5qhq","url":"https://osv.dev/vulnerability/GHSA-h2fg-54x9-5qhq"}],"summary":"Nil dereference in NATS JWT, DoS of nats-server"}