What is CVE-2026-19111?

CVE-2026-19111 is a high-severity vulnerability in AWS Strands-Agents-Tools, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-06.

How severe is CVE-2026-19111?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in AWS Strands-Agents-Tools

CVE-2026-19111

Insecure direct object reference in the mongodb_memory, elasticsearch_memory, and mem0_memory tools in Amazon Strands Agents Tools before 0.8.3 might allow remote authenticated users to access, modify, or delete memories belonging to other tenants by influencing the LLM to emit tool calls with a forged namespace parameter. To remediate this issue, users should upgrade to version 0.8.3.

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.004 (30.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Aws Strands-agents-tools — versions 0

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

ff89ba41-3aa1-4d27-914a-91399e9639e5 (vendor-advisory)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes)
ff89ba41-3aa1-4d27-914a-91399e9639e5 (release-notes, patch)

Frequently asked questions

What is CVE-2026-19111?: CVE-2026-19111 is a high-severity vulnerability in AWS Strands-Agents-Tools, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 8.1/10. Published 2026-08-06.
How severe is CVE-2026-19111?: High severity. CVSS v3 base score is 8.1 out of 10.