CVE-2026-97731
Quick assessment
Affected
MinIO MinIO
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
以下是对该漏洞描述信息的中文翻译： 在 MinIO 7aac2a2 及更早版本中，系统未验证请求中存在的所有 头部（header）是否均出现在客户端提供的 列表中。 中的 函数仅遍历声称的签名头部列表，而从未枚举实际接收到的所有头部。因此，一个未签名的头部既不会被纳入规范请求（canonical request）的哈希计算，也不会被拒绝。 由于 仅根据 头部的存在与否来分发 操作，持有针对单个对象限定范围的预签名（presigned）PUT URL 的攻击者，只需将该头部添加到未修改的 URL 中，即可触发服务端复
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I. Basic Information for CVE-2026-97731
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-97731
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Other References for CVE-2026-97731 (1)
IV. Related Vulnerabilities
Same product: MinIO
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CVE-2026-42600
MinIO: Path Traversal via msgpack Body in `ReadMultiple` Sto -
CVE-2026-41145
MinIO has an Unauthenticated Object Write via Query-String C -
CVE-2026-40344
MinIO has an Unauthenticated Object Write via Missing Signat -
CVE-2026-39414
MinIO affected a DoS via Unbounded Memory Allocation in S3 S -
CVE-2026-34204
MinIO is Vulnerable to SSE Metadata Injection via Replicatio
Same vendor: MinIO
-
CVE-2026-42600
MinIO: Path Traversal via msgpack Body in `ReadMultiple` Sto -
CVE-2026-41145
MinIO has an Unauthenticated Object Write via Query-String C -
CVE-2026-40344
MinIO has an Unauthenticated Object Write via Missing Signat -
CVE-2026-39414
MinIO affected a DoS via Unbounded Memory Allocation in S3 S -
CVE-2026-34204
MinIO is Vulnerable to SSE Metadata Injection via Replicatio
Same weakness: CWE-347
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CVE-2026-94418
Signature failure masked by date error under WOLFSSL_SMALL_C -
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Contrast before 1.12.1 Insecure LUKS2 Persistent Storage -
CVE-2026-61855
Zammad: Invalid PGP Detached Signatures Reported as Good Sig -
CVE-2026-97732
Ironshield 1.0.0.167内核驱动绕过认证漏洞 -
CVE-2026-91187
Improper Verification of Cryptographic Signature in dashbit
V. Comments for CVE-2026-97731
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