CVE-2026-71190
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1333 |
| Vendor | openstack |
| Product | swift |
| Published | Aug 5, 2026 |
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Affected Versions
OpenStack / Swift
1.9.1 < 2.35.4 2.36.0 < 2.36.3 2.37.0 < 2.37.3 2.38.0