Cloudanix VulnDB

CVE-2026-71191

None

CVSS

—

EPSS

0.6%

Published

Aug 5, 2026

CISA due date

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The record

In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the SigV4 signature on presigned URL requests. An attacker who obtains a presigned PUT URL can inject an unsigned X-Amz-Copy-Source header, causing Swift to perform a server-side copy from an arbitrary source object using the signer's authorization context. The attacker can read any object the signer has access to, provided the target project_id, container name, and object name are known. This affects all deployments using the default s3_acl=false configuration.

Affected packages

Ecosystem Package Introduced Fixed

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