CVE-2026-49017

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.

CVSS

No CVSS.

References

Link	Resource
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

Configurations

No configuration.

History

No history.

Information

Published : 2026-05-27 02:16

Updated : 2026-07-24 12:10

NVD link : CVE-2026-49017

Mitre link : CVE-2026-49017

CVE.ORG link : CVE-2026-49017

JSON object : View

Products Affected

No product.

CWE

CWE-835

Loop with Unreachable Exit Condition ('Infinite Loop')

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