CVE-2026-49017_CVE-2026-49017

7.1 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-49017

Source mitre

Published May 27, 2026 at 01:57

Affected Product

Vendor OpenStack

Product Swift

Version 2.36.0

Affected Versions OpenStack Swift 2.36.0
OpenStack Swift 2.37.0

CWE Classification

CWE-835

References

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    "published": "2026-05-27T01:57:58.831Z",
    "modified": "2026-05-27T01:57:58.831Z",
    "type": "cve",
    "title": "CVE-2026-49017",
    "source": "mitre",
    "references": "https://bugs.launchpad.net/bugs/2152205\nhttps://review.opendev.org/c/openstack/swift/+/987957\nhttps://review.opendev.org/c/openstack/swift/+/988093",
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    "cvss": {
        "score": 7.1,
        "severity": "HIGH",
        "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",
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