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CVE-2026-71190

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及之前版本存在资源管理错误漏洞，该漏洞源于代理服务器Accept标头解析器中的正则表达式存在灾难性回溯（ReDoS），可能导致未经身份验证的远程攻击者发送特制Accept标头，造成指数级CPU消耗，重复请求可耗尽所有代理工作线程，导致完全拒绝服务。

CVSS 8.7 · High EPSS 0.84% · P56

Affected Version Matrix 4

VendorProduct Version RangeStatus
OpenStack Swift 1.9.1< 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-2026-71190

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, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS). The "qdtext" pattern (?:[^"]|\\.)* allows an unauthenticated remote attacker to send a crafted Accept header that causes exponential CPU consumption in the proxy worker. A payload of 32 backslash-character pairs exceeds 30 seconds of CPU time. No authentication is required. Repeated requests can exhaust all proxy worker threads, resulting in a complete denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
OpenStack Swift 资源管理错误漏洞
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及之前版本存在资源管理错误漏洞，该漏洞源于代理服务器Accept标头解析器中的正则表达式存在灾难性回溯（ReDoS），可能导致未经身份验证的远程攻击者发送特制Accept标头，造成指数级CPU消耗，重复请求可耗尽所有代理工作线程，导致完全拒绝服务。
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 1.9.1 ~ 2.35.4 -

II. Public POCs for CVE-2026-71190

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III. Intelligence Information for CVE-2026-71190

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Vendor Advisories for CVE-2026-71190 (1)

Mailing List Discussions for CVE-2026-71190 (1)

Other References for CVE-2026-71190 (1)

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

CVE-2026-55707 7.1 HIGH OpenStack Neutron 授权问题漏洞
CVE-2026-71191 6.0 MEDIUM OpenStack Swift 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-1333

V. Comments for CVE-2026-71190

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