{"id":"CVE-2026-71190","title":"In OpenStack Swift through 2.38.0, the proxy server Accept header parser contains a regular expression vulnerable to catastrophic backtracking (ReDoS)","summary":"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 …","severity":"none","cwe":["CWE-1333"],"published":"2026-08-05","updated":"2026-09-09","sourceUpdated":"2026-09-09T16:03:22.897","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71190","references":[{"url":"https://launchpad.net/bugs/2158771","label":"cve@mitre.org"},{"url":"https://openwall.com/lists/oss-security/2026/07/28/27","label":"cve@mitre.org"},{"url":"https://security.openstack.org/ossa/OSSA-2026-031.html","label":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/08/05/19","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00538,"epssPercentile":0.44012,"ingestedAt":"2026-09-09T16:14:05.512Z","slug":"CVE-2026-71190","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}