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CVE-2026-49017

Published May 27, 2026 CWE-835 EPSS 0.32% (25th pctl)

Overview

CVE-2026-49017 is a known-severity vulnerability. It was published on May 27, 2026.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Ref bugs.launchpad.net/bugs/2152205 Ref review.opendev.org/c/openstack/swift/+/987957 Ref review.opendev.org/c/openstack/swift/+/988093 Ref www.openwall.com/lists/oss-security/2026/05/27/9 Ref www.openwall.com/lists/oss-security/2026/06/02/6

Frequently Asked Questions

What is CVE-2026-49017?

CVE-2026-49017 is a known-severity vulnerability. It was published on May 27, 2026.

How severe is CVE-2026-49017?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-49017?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-49017?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-49017 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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