CVE-2026-71190

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.

CVSS

No CVSS.

References

Link	Resource
https://launchpad.net/bugs/2158771
https://openwall.com/lists/oss-security/2026/07/28/27
https://security.openstack.org/ossa/OSSA-2026-031.html
http://www.openwall.com/lists/oss-security/2026/08/05/19

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-05 06:16

Updated : 2026-09-09 16:03

NVD link : CVE-2026-71190

Mitre link : CVE-2026-71190

CVE.ORG link : CVE-2026-71190

JSON object : View

Products Affected

No product.

CWE

CWE-1333

Inefficient Regular Expression Complexity

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