{"schema_version":"1.7.5","id":"GHSA-5cx5-wh4m-82fh","published":"2026-03-19T17:56:37Z","modified":"2026-06-03T02:44:17.797316569Z","aliases":["BIT-minio-2026-33322","CVE-2026-33322","GO-2026-4779"],"related":["CGA-2qff-97q5-mw64"],"summary":"MinIO has JWT Algorithm Confusion in OIDC Authentication","details":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nA JWT algorithm confusion vulnerability in MinIO's OpenID Connect authentication allows an attacker who knows the OIDC `ClientSecret` to forge arbitrary identity tokens and obtain S3 credentials with any policy, including `consoleAdmin`.\n\nAn attacker with knowledge of the OIDC `ClientSecret` can:\n\n- Impersonate any user identity\n- Obtain S3 credentials with any IAM policy, including `consoleAdmin`\n- Access, modify, or delete any data in the MinIO deployment\n\nThe attack is deterministic (100% success rate, no race conditions).\n\n#### Attack Prerequisites\n\nThe attacker must know the OIDC `ClientSecret`. While this is a shared credential (not a private key), it is more accessible than commonly assumed:\n\n- CVE-2023-28432 previously leaked environment variables including `MINIO_IDENTITY_OPENID_CLIENT_SECRET`\n- Client secrets are often present in frontend OAuth configurations, mobile app bundles, CI/CD pipelines, and shared configuration files\n- In many organizations, the client secret is accessible to operators and engineers who should not be able to forge arbitrary identities\n\n\n#### Affected Versions\n\nAll MinIO releases from `RELEASE.2022-11-08T05-27-07Z` through the final release of the `minio/minio` open-source project.\n\n### Patches\n\n**Fixed in:** MinIO AIStor `RELEASE.2026-03-17T21-25-16Z`\n\n## Downloads\n\n### Binary Downloads\n\n| Platform | Architecture | Download                                                                    |\n| -------- | ------------ | --------------------------------------------------------------------------- |\n| Linux    | amd64        | [minio](https://dl.min.io/aistor/minio/release/linux-amd64/minio)           |\n| Linux    | arm64        | [minio](https://dl.min.io/aistor/minio/release/linux-arm64/minio)           |\n| macOS    | arm64        | [minio](https://dl.min.io/aistor/minio/release/darwin-arm64/minio)          |\n| macOS    | amd64        | [minio](https://dl.min.io/aistor/minio/release/darwin-amd64/minio)          |\n| Windows  | amd64        | [minio.exe](https://dl.min.io/aistor/minio/release/windows-amd64/minio.exe) |\n\n### FIPS Binaries\n\n| Platform | Architecture | Download                                                                    |\n| -------- | ------------ | --------------------------------------------------------------------------- |\n| Linux    | amd64        | [minio.fips](https://dl.min.io/aistor/minio/release/linux-amd64/minio.fips) |\n| Linux    | arm64        | [minio.fips](https://dl.min.io/aistor/minio/release/linux-arm64/minio.fips) |\n\n### Package Downloads\n\n| Format | Architecture | Download                                                                                                                            |\n| ------ | ------------ | ----------------------------------------------------------------------------------------------------------------------------------- |\n| DEB    | amd64        | [minio_20260317212516.0.0_amd64.deb](https://dl.min.io/aistor/minio/release/linux-amd64/minio_20260317212516.0.0_amd64.deb)         |\n| DEB    | arm64        | [minio_20260317212516.0.0_arm64.deb](https://dl.min.io/aistor/minio/release/linux-arm64/minio_20260317212516.0.0_arm64.deb)         |\n| RPM    | amd64        | [minio-20260317212516.0.0-1.x86_64.rpm](https://dl.min.io/aistor/minio/release/linux-amd64/minio-20260317212516.0.0-1.x86_64.rpm)   |\n| RPM    | arm64        | [minio-20260317212516.0.0-1.aarch64.rpm](https://dl.min.io/aistor/minio/release/linux-arm64/minio-20260317212516.0.0-1.aarch64.rpm) |\n\n### Container Images\n\n```bash\n# Standard\ndocker pull quay.io/minio/aistor/minio:RELEASE.2026-03-17T21-25-16Z\npodman pull quay.io/minio/aistor/minio:RELEASE.2026-03-17T21-25-16Z\n\n# FIPS\ndocker pull quay.io/minio/aistor/minio:RELEASE.2026-03-17T21-25-16Z.fips\npodman pull quay.io/minio/aistor/minio:RELEASE.2026-03-17T21-25-16Z.fips\n```\n\n### Homebrew (macOS)\n\n```bash\nbrew install minio/aistor/minio\n```\n\n### Workarounds\n\n- [Users of the open-source `minio/minio` project should upgrade to MinIO AIStor `RELEASE.2026-03-17T21-25-16Z` or later.](https://docs.min.io/enterprise/aistor-object-store/upgrade-aistor-server/community-edition/)\n- As a workaround, ensure that the OIDC `ClientSecret` is treated as a highly sensitive credential and is not exposed to untrusted parties.","affected":[{"package":{"name":"github.com/minio/minio","ecosystem":"Go","purl":"pkg:golang/github.com/minio/minio"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"0.0.0-20260212201848-7aac2a2c5b7c"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-5cx5-wh4m-82fh/GHSA-5cx5-wh4m-82fh.json"}}],"references":[{"type":"WEB","url":"https://github.com/minio/minio/security/advisories/GHSA-5cx5-wh4m-82fh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33322"},{"type":"PACKAGE","url":"https://github.com/minio/minio"}],"database_specific":{"cwe_ids":["CWE-287","CWE-327"],"github_reviewed":true,"github_reviewed_at":"2026-03-19T17:56:37Z","nvd_published_at":"2026-03-24T20:16:27Z","severity":"CRITICAL"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}]}