EUVD-2026-61064
GHSA-xv32-q7mj-p5x2
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable with no authentication or interaction required; impact is availability-only via resource exhaustion, scope unchanged.
Primary rating from Vendor (AMZN).
CVSS VectorVendor: AMZN
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
Improper input validation in the capabilities route handler in OpenSearch Dashboards - the size of the request payload is not bounded - might allow remote attackers to cause a denial of service via a crafted HTTP request.
AnalysisAI
Unbounded HTTP request payload processing in OpenSearch Dashboards' capabilities route handler allows unauthenticated remote attackers to exhaust server resources and cause a denial of service. Affected products span both self-hosted OpenSearch Dashboards (all versions per CPE) and Amazon OpenSearch Service. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No authentication is required (CVSS PR:N) and no user interaction is needed (UI:N). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N) scores 8.7, driven entirely by high availability impact and the absence of any barrier to exploitation: no authentication, no user interaction, low complexity, and no special attack requirements. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An unauthenticated attacker sends a single crafted HTTP request with an arbitrarily large body to the capabilities route handler endpoint on a network-accessible OpenSearch Dashboards instance. The server buffers and attempts to process the oversized payload, exhausting available memory or CPU on the Node.js process. … |
| Remediation | Upgrade to the patched release of OpenSearch Dashboards available at https://opensearch.org/downloads/ per vendor advisory https://aws.amazon.com/security/security-bulletins/2026-082-aws/. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all OpenSearch Dashboards deployments across self-hosted and Amazon OpenSearch Service environments and determine network accessibility from untrusted networks; cross-reference your current versions against the vendor advisory to confirm exposure status. …
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Same technique Denial Of Service
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External POC / Exploit Code
Leaving vuln.today