CVE-2026-97731

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://github.com/pgsty/silo/commit/1233254309b15571f101b2b26d531951ceaeef1e cve@mitre.org
• https://silo.pgsty.com/about/security-advisories/#sn-2026-011 cve@mitre.org

The full cvelistV5 record. Download as CVE-2026-97731.json.

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                "id": "CVE-2026-97731",
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                "role": "CISA Coordinator",
                "timestamp": "2026-09-25T15:22:42.586752Z",
                "version": "2.0.3"
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        "title": "CISA ADP Vulnrichment"
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          "product": "MinIO",
          "repo": "https://github.com/minio/minio",
          "vendor": "MinIO",
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          "lang": "en",
          "value": "MinIO through 7aac2a2 does not verify that every x-amz-* header present on a request also appears in the client-supplied X-Amz-SignedHeaders list. extractSignedHeaders() in cmd/signature-v4-utils.go iterates only the claimed list and never enumerates the headers that actually arrived, and thus a header that arrives unsigned is neither hashed into the canonical request nor rejected. Because cmd/api-router.go dispatches CopyObject on the presence of x-amz-copy-source alone, the holder of a presigned PUT URL scoped to a single object can add that header to the unmodified URL and cause a server-side copy, executed as the signer, of any object the signing key can read. A grant to write one object becomes a read of every bucket that key can reach. Amazon S3 rejects the equivalent request with HTTP 403 AccessDenied. The minio/minio GitHub repository was archived in April 2026; pgsty/silo before 1233254 is also affected."
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