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6.0 Medium

CVE-2026-71192 In OpenStack Swift through 2.38.0, the S3API middleware does not sanitize Swift-native control headers (X-Copy-From,…

Description

In OpenStack Swift through 2.38.0, the S3API middleware does not sanitize Swift-native control headers (X-Copy-From, X-Copy-From-Account) from S3 API requests when s3_acl=true. An attacker can inject these headers into a signed PUT request targeting their own bucket, causing Swift to perform a server-side copy from another tenant's private object. The source object authorization is bypassed because the S3API middleware has already authorized the request against the destination. The attacker can read any object whose project_id, container name, and object name are known, regardless of the source object's ACLs or ownership. This requires the non-default s3_acl=true configuration.

Affected products and versions

Product Affected versions Fixed in
Swift 2.38.0 No fix stated
Swift 2.37 2.37.0 → < 2.37.3 2.37.3
Swift 2.36 2.36.0 → < 2.36.3 2.36.3
Swift 2.18 2.18.0 → < 2.35.4 2.35.4

Other CVEs of Swift

The 6 CVEs of Swift →
CVE-2026-97149 In OpenStack Swift before 2.38.2, the tempurl middleware does not reject the X-Copy-From header on PUT requests 5.3 Medium CVE-2026-71191 In OpenStack Swift through 2.38.0, S3API middleware does not enforce that semantic x-amz-* headers are covered by the… 6.0 Medium CVE-2026-71190 In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to… 8.7 High CVE-2026-50221 In OpenStack Swift before 2.37.2, proxy-server does not strip internal update headers (X-Container-Host,… 5.3 Medium
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