OpenStack Swift up to 2.35.3/2.36.2/2.37.2/2.38.0 S3API Middleware improper authorization

Summaryinfo

A vulnerability was found in OpenStack Swift up to 2.35.3/2.36.2/2.37.2/2.38.0 and classified as problematic. This vulnerability affects unknown code of the component S3API Middleware. Executing a manipulation can lead to improper authorization. This vulnerability is handled as CVE-2026-71192. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in OpenStack Swift up to 2.35.3/2.36.2/2.37.2/2.38.0. It has been declared as problematic. This vulnerability affects an unknown code of the component S3API Middleware. The manipulation with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is available at launchpad.net. This vulnerability was named CVE-2026-71192 since 08/05/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 2.35.4, 2.36.3 or 2.37.3 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Cloud Software

Vendor

• OpenStack

Name

• Swift

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25
• 2.26
• 2.27
• 2.28
• 2.29
• 2.30
• 2.31
• 2.32
• 2.33
• 2.34
• 2.35
• 2.35.0
• 2.35.1
• 2.35.2
• 2.35.3
• 2.36
• 2.36.0
• 2.36.1
• 2.36.2
• 2.37
• 2.37.0
• 2.37.1
• 2.37.2
• 2.38.0

License

• free

Website

• Vendor: https://www.openstack.org/

CPE 2.3info

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CPE 2.2info

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