CVSS 4.0
7.1 highCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:LCVE-2026-49017
High (7.1) in openstack swift. EPSS 0.4% chance of exploitation in the next 30 days.
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.
Severity
CVSS 3.1
6.5 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H- EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 29% of CVEs (scores of 2026-10-31)
- CWE
- CWE-835
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openstack:swift
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g7jq-j257-rww2 | PyPI | swift | >=2.36.0 <=2.36.1 | no fix published |
| GHSA-g7jq-j257-rww2 | PyPI | swift | >=2.37.0 <=2.37.1 | no fix published |
| PYSEC-2026-3080 | PyPI | swift | >=2.36.0 <=2.36.1 >=2.37.0 <=2.37.1 | no fix published |