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VULNERABILITIES

CVE-2026-115419 Details

Description

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).

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: AMZNCVSS-B:8.1 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-146-aws/ AMZN
https://github.com/strands-agents/harness-sdk/security/advisories/GHSA-4v6f-7vjh-6x4m AMZN
https://pypi.org/project/strands-agents/1.43.0/ AMZN
https://www.npmjs.com/package/@strands-agents/sdk/v/1.5.0 AMZN

Weakness Enumeration

CWE-IDCWE NameSource
CWE-488Exposure of Data Element to Wrong SessionAMZN

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-115419
NVD Published Date:
Oct 22, 2026
NVD Last Modified:
Oct 30, 2026
Source:
AMZN
CVE-2026-115419 Details - Not Deferred