HIGH 8.7 NVD
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 "qdt
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.
References
- https://launchpad.net/bugs/2158771
- https://openwall.com/lists/oss-security/2026/07/28/27
- https://security.openstack.org/ossa/OSSA-2026-031.html
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-08-05 via NVD.
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