CVE-2026-34204
published 2026-03-31CVE-2026-34204: MinIO is a high-performance object storage system. Prior to version RELEASE.2026-03-26T21-24-40Z, a flaw in extractMetadataFromMime() allows any authenticated…
PriorityP338high7.1CVSS 3.1
AVNACLPRLUINSUCNILAH
EPSS
0.12%
2.5th percentile
MinIO is a high-performance object storage system. Prior to version RELEASE.2026-03-26T21-24-40Z, a flaw in extractMetadataFromMime() allows any authenticated user with s3:PutObject permission to inject internal server-side encryption metadata into objects by sending crafted X-Minio-Replication-* headers on a normal PutObject request. This issue has been patched in version RELEASE.2026-03-26T21-24-40Z.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | minio_minio | 0.0.0-20240328174456-468a9fae83e9 – 0.0.0-20260212201848-7aac2a2c5b7c | — |
| github.com | minio_minio | >= 0.0.0-20240328174456-468a9fae83e9 | — |
| minio | minio | < RELEASE.2026-03-26T21-24-40Z | RELEASE.2026-03-26T21-24-40Z |
| minio | minio | < 2026-03-26t21-24-40z | 2026-03-26t21-24-40z |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
nvdv4.07.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio
osv·2026-04-02
CVE-2026-34204 MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers in github.com/minio/minio
GHSA
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
ghsa·2026-03-27
CVE-2026-34204 [HIGH] CWE-287 MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
## Impact
_What kind of vulnerability is it? Who is impacted?_
A flaw in `extractMetadataFromMime()` allows any authenticated user with `s3:PutObject` permission to inject internal server-side encryption metadata into objects by sending crafted `X-Minio-Replication-*` headers on a normal PutObject request. The server unconditionally maps these headers to `X-Minio-Internal-*` encryption metadata without verifying that the request is a legitimate replication request. Objects written this way carry bogus encryption keys and become **permanently unreadable** through the S3 API.
Any authenticated user or service with `s3:PutObject` permission on any bucket can make objects permanently unreadable by injecting fake SSE encr
OSV
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
osv·2026-03-27
CVE-2026-34204 [HIGH] MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
MinIO is Vulnerable to SSE Metadata Injection via Replication Headers
## Impact
_What kind of vulnerability is it? Who is impacted?_
A flaw in `extractMetadataFromMime()` allows any authenticated user with `s3:PutObject` permission to inject internal server-side encryption metadata into objects by sending crafted `X-Minio-Replication-*` headers on a normal PutObject request. The server unconditionally maps these headers to `X-Minio-Internal-*` encryption metadata without verifying that the request is a legitimate replication request. Objects written this way carry bogus encryption keys and become **permanently unreadable** through the S3 API.
Any authenticated user or service with `s3:PutObject` permission on any bucket can make objects permanently unreadable by injecting fake SSE encr
No detection rules found.
No public exploits indexed.
2026-03-31
Published