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CVE-2026-115419— Unintended disclosure of data element to wrong session in Strands Agents SDK A2A Server

Quick assessment

Affected
AWS strands-agents
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 1.43.0 版本之前的 Amazon Strands Agents Python SDK 以及 1.5.0 版本之前的 Amazon Strands Agents TypeScript SDK 中，A2A 服务器组件未能正确隔离不同调用方之间的会话状态。经过身份验证的远程攻击者可通过向 A2A 端点发送 HTTP 请求（使用不同的 context_id），读取其他租户的对话历史，并添加持久化指令，从而改变模型对后续调用方的行为。 为缓解此问题，用户应将 strands-agents 升级至 1.43.0（Py

CVSS 8.1 · High
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I. Basic Information for CVE-2026-115419

Vulnerability Information
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Vulnerability Title
Unintended disclosure of data element to wrong session in Strands Agents SDK A2A Server
Source: CVE Program / CVE List V5
Vulnerability 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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对错误会话暴露数据元素
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AWS strands-agents 0 ~ 1.43.0 -
AWS strands-agents/sdk 0 ~ 1.5.0 -

II. Public POCs for CVE-2026-115419

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III. Intelligence Information for CVE-2026-115419

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Other References for CVE-2026-115419 (4)

Same Patch Batch · AWS · 2026-10-22 · 4 CVEs total

CVE-2026-115414 7.8 HIGH OS command injection in the Terraform hook in AWS SAM CLI
CVE-2026-115416 7.7 HIGH Incorrect authorization checks in Amazon Athena engine version 3 query processing
CVE-2026-115417 7.5 HIGH Memory allocation with excessive size value in the MQTT 3.1.1 compatibility adapter in aws

IV. Related Vulnerabilities

Same vendor: AWS
Same weakness: CWE-488

V. Comments for CVE-2026-115419

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