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

> CVE-2026-115419: Unintended disclosure of data element to wrong session in Strands Agents SDK A2A Server. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-115419
Last updated: 2026-10-23T17:17:17Z

- Published: 2026-10-22 20:04 UTC · Updated: 2026-10-23 17:17 UTC · Assigner: AMZN
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.43%, 37th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: 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).

## Affected vendors and products

- AWS: strands-agents
- AWS: strands-agents/sdk

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-115419)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-115419)
- [https://aws.amazon.com/security/security-bulletins/2026-146-aws/](https://aws.amazon.com/security/security-bulletins/2026-146-aws/)
- [https://github.com/strands-agents/harness-sdk/security/advisories/GHSA-4v6f-7vjh-6x4m](https://github.com/strands-agents/harness-sdk/security/advisories/GHSA-4v6f-7vjh-6x4m)
- [https://pypi.org/project/strands-agents/1.43.0/](https://pypi.org/project/strands-agents/1.43.0/)
- [https://www.npmjs.com/package/@strands-agents/sdk/v/1.5.0](https://www.npmjs.com/package/@strands-agents/sdk/v/1.5.0)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-115419 · Markdown: https://rewindex.com/cve/CVE-2026-115419.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-115419 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:13:33.691Z