{"id":"CVE-2026-49017","state":"PUBLISHED","title":"In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly ","description":"In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. The StreamingInput class repeatedly appends an empty buffer and re-reads, causing the proxy-server worker handling the request to become permanently unresponsive with increasing CPU and memory consumption. An authenticated attacker can systematically exhaust all proxy-server workers, resulting in denial of service. The defect was introduced in Swift 2.36.0.","publishedAt":"2026-05-27T01:57:58.831Z","updatedAt":"2026-06-02T17:33:08.620Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L","source":"mitre"},"assigner":"mitre","products":["OpenStack Swift"],"affected":[{"vendor":"OpenStack","product":"Swift","defaultStatus":"unaffected","versions":[{"version":"2.36.0","status":"affected","lessThan":"2.36.2","versionType":"semver"},{"version":"2.37.0","status":"affected","lessThan":"2.37.2","versionType":"semver"},{"version":"2.35.1","status":"affected","lessThan":"2.35.3","versionType":"semver"}],"repo":"https://opendev.org/openstack/swift"}],"references":["https://bugs.launchpad.net/bugs/2152205","https://review.opendev.org/c/openstack/swift/+/987957","https://review.opendev.org/c/openstack/swift/+/988093","http://www.openwall.com/lists/oss-security/2026/05/27/9","http://www.openwall.com/lists/oss-security/2026/06/02/6"],"weaknesses":["CWE-835"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/49xxx/CVE-2026-49017.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-49017","state":"PUBLISHED","datePublished":"2026-05-27T01:57:58.831Z","dateUpdated":"2026-06-02T17:33:08.620Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-05-27T01:57:58.189Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In OpenStack Swift before 2.36.2 and 2.37.2, s3api middleware enters an infinite loop when processing a truncated aws-chunked PUT request body. 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