HIGH 8.6 NVD
CVE-2026-115419
The A2A server component in Amazon Strands Agents SDK for Python before 1.43.0 and Amazon Strands Agents SDK for TypeScript before 1.5.0 does not properly isola
The A2A server component in Amazon Strands Agents SDK for Python before 1.43.0 and Amazon Strands Agents SDK for TypeScript before 1.5.0 does not properly isolate conversation state between callers. An authenticated remote user could read other tenants' conversation history and add persistent instructions that alter model behavior for subsequent callers via HTTP requests to the A2A endpoint using a different context_id.
To mitigate this issue, users should upgrade to strands-agents 1.43.0 (Python) or @strands-agents/sdk 1.5.0 (TypeScript).
References
- https://aws.amazon.com/security/security-bulletins/2026-146-aws/
- https://github.com/strands-agents/harness-sdk/security/advisories/GHSA-4v6f-7vjh-6x4m
- https://pypi.org/project/strands-agents/1.43.0/
- https://www.npmjs.com/package/@strands-agents/sdk/v/1.5.0
This high severity vulnerability with a CVSS score of 8.6 was published on 2026-10-22 via NVD.
vulnfeed aggregates 17279 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.