CVE-2026-71190 | BDVDB-2026-355603 Detail

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.

Impact#

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Exploit#

History#

1. Version 12026-08-05Record published in the CVE List.
2. Version 22026-08-06Most recent update recorded in the CVE List.