CVE Explorer
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 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
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"Swift","repo":"https://opendev.org/openstack/swift","vendor":"OpenStack","versions":[{"lessThan":"2.36.2","status":"affected","version":"2.36.0","versionType":"semver"},{"lessThan":"2.37.2","status":"affected","version":"2.37.0","versionType":"semver"},{"lessThan":"2.35.3","status":"affected","version":"2.35.1","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.1,"baseSeverity":"HIGH","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/problemTypes/0/descriptions/0
Source references
5 source assertions{"url":"http://www.openwall.com/lists/oss-security/2026/05/27/9"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/adp/1/references/0
{"url":"http://www.openwall.com/lists/oss-security/2026/06/02/6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/adp/1/references/1
{"tags":["issue-tracking"],"url":"https://bugs.launchpad.net/bugs/2152205"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/references/0
{"tags":["patch"],"url":"https://review.opendev.org/c/openstack/swift/+/987957"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/references/1
{"tags":["technical-description"],"url":"https://review.opendev.org/c/openstack/swift/+/988093"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:733a619454e231835ff99454f79e171f0264525e7a19cc6fb146646839272d42 · sha256:f18ea122f2f9c8bb… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.