Medium severity6.5NVD Advisory· Published May 27, 2026· Updated Sep 24, 2026
CVE-2026-49017
CVE-2026-49017
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
swiftPyPI | >= 2.36.0, <= 2.36.1 | — |
swiftPyPI | >= 2.37.0, <= 2.37.1 | — |
Affected products
3Patches
Vulnerability mechanics
References
7- www.openwall.com/lists/oss-security/2026/05/27/9nvdMailing ListPatchThird Party AdvisoryWEB
- www.openwall.com/lists/oss-security/2026/06/02/6nvdMailing ListPatchThird Party AdvisoryWEB
- review.opendev.org/c/openstack/swift/+/987957nvdIssue TrackingPatchWEB
- review.opendev.org/c/openstack/swift/+/988093nvdIssue TrackingPatchWEB
- bugs.launchpad.net/bugs/2152205nvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-g7jq-j257-rww2ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-49017ghsaADVISORY
News mentions
1- OpenStack: Six Medium-to-High CVEs Disclosed Across Neutron, Keystone, and SwiftVypr Intelligence · May 28, 2026