CVEvulnerability
CVE-2026-115419
8.6 HIGH
Official page ↗
- Status
- Awaiting Analysis
- Published
- 2026-10-22
- Last modified
- 2026-10-23
- Assigner
- ff89ba41-3aa1-4d27-914a-91399e9639e5
- CVSS 4.0 (ff89ba41-3aa1-4d27-914a-91399e9639e5)
- 8.6 HIGH — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/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
- CVSS 3.1 (ff89ba41-3aa1-4d27-914a-91399e9639e5)
- 8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-488
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).
Related
Weakness · CWE (1)
- CWE-488 Exposure of Data Element to Wrong Session weakness
References
- https://aws.amazon.com/security/security-bulletins/2026-146-aws/ aws.amazon.com
- https://github.com/strands-agents/harness-sdk/security/advisories/GHSA-4v6f-7vjh-6x4m github.com
- https://pypi.org/project/strands-agents/1.43.0/ pypi.org
- https://www.npmjs.com/package/@strands-agents/sdk/v/1.5.0 www.npmjs.com