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...
Published: 2026-05-27 · Last updated: 2026-06-02
Severity and scoring
- CWE
- CWE-835
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-49017
- [Other]https://bugs.launchpad.net/bugs/2152205
- [Other]https://review.opendev.org/c/openstack/swift/+/987957
- [Other]https://review.opendev.org/c/openstack/swift/+/988093
- [Other]http://www.openwall.com/lists/oss-security/2026/05/27/9
- [Other]http://www.openwall.com/lists/oss-security/2026/06/02/6
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