{"id":"CVE-2020-26160","aliases":["GHSA-w73w-5m7g-f7qc","GO-2020-0017","SNYK-GOLANG-GITHUBCOMDGRIJALVAJWTGO-596515"],"url":"https://o3.security/vulnerability/CVE-2020-26160","summary":"Authorization bypass in github.com/dgrijalva/jwt-go","details":"jwt-go allows attackers to bypass intended access restrictions in situations with `[]string{}` for `m[\"aud\"]` (which is allowed by the specification). Because the type assertion fails, \"\" is the value of aud. This is a security problem if the JWT token is presented to a service that lacks its own audience check. There is no patch available and users of jwt-go are advised to migrate to [golang-jwt](https://github.com/golang-jwt/jwt) at version 3.2.1","published":"2020-09-30T18:15:27.397Z","modified":"2026-07-09T12:33:12.671361Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Go","name":"github.com/dgrijalva/jwt-go","fixedVersion":null},{"ecosystem":"Go","name":"github.com/dgrijalva/jwt-go/v4","fixedVersion":"4.0.0-preview1"}],"fix":{"url":"https://github.com/dgrijalva/jwt-go/pull/426","label":"dgrijalva/jwt-go#426"},"references":[{"type":"ADVISORY","url":"https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMDGRIJALVAJWTGO-596515"},{"type":"FIX","url":"https://github.com/dgrijalva/jwt-go/pull/426"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26160"},{"type":"WEB","url":"https://github.com/dgrijalva/jwt-go/issues/422"},{"type":"WEB","url":"https://github.com/dgrijalva/jwt-go/issues/462"},{"type":"WEB","url":"https://github.com/dgrijalva/jwt-go/commit/ec0a89a131e3e8567adcb21254a5cd20a70ea4ab"},{"type":"PACKAGE","url":"https://github.com/dgrijalva/jwt-go"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2020-0017"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T12:33:12.671361Z"}}