VULNERABILITY INTELLIGENCE
CVE-2026-71190
EPSS probability0.84%
CISA KEVNot currently listed
Published2026-08-05
Last modified2026-10-24
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.
Weakness classification
- cve@mitre.org: CWE-1333