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CVE-2026-71191

Quick assessment

Affected
OpenStack Swift
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.

OpenStack Swift是OpenStack基金会开源的一个存储永久静态数据的存储项目。 OpenStack Swift 2.38.0及之前版本存在授权问题漏洞，该漏洞源于S3API中间件未强制要求预签名URL请求中的语义x-amz-*标头由SigV4签名覆盖，可能导致攻击者注入未签名的X-Amz-Copy-Source标头，利用签名者的授权上下文读取任意对象。

CVSS 6.0 · Medium EPSS 0.41% · P33

Possible ATT&CK Techniques 2 AI

T1135 · Network Share Discovery T1530.001

Affected Version Matrix 4

VendorProduct Version RangeStatus
OpenStack Swift 2.18.0< 2.35.4 affected
2.36.0< 2.36.3 affected
2.37.0< 2.37.3 affected
2.38.0 affected
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I. Basic Information for CVE-2026-71191

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Swift 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenStack Swift是OpenStack基金会开源的一个存储永久静态数据的存储项目。 OpenStack Swift 2.38.0及之前版本存在授权问题漏洞，该漏洞源于S3API中间件未强制要求预签名URL请求中的语义x-amz-*标头由SigV4签名覆盖，可能导致攻击者注入未签名的X-Amz-Copy-Source标头，利用签名者的授权上下文读取任意对象。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenStack Swift 2.18.0 ~ 2.35.4 -

II. Public POCs for CVE-2026-71191

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III. Intelligence Information for CVE-2026-71191

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Vendor Advisories for CVE-2026-71191 (1)

Mailing List Discussions for CVE-2026-71191 (1)

Same Patch Batch · OpenStack · 2026-08-05 · 5 CVEs total

CVE-2026-71190 8.7 HIGH OpenStack Swift 资源管理错误漏洞
CVE-2026-55707 7.1 HIGH OpenStack Neutron 授权问题漏洞
CVE-2026-71192 6.0 MEDIUM OpenStack Swift 授权问题漏洞
CVE-2026-71201 5.0 MEDIUM OpenStack ironic 授权问题漏洞

IV. Related Vulnerabilities

Same product: Swift
Same vendor: OpenStack
Same weakness: CWE-863

V. Comments for CVE-2026-71191

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