Vulnerability · Published Aug 6, 2026 · Assigned by AMZN

CVE-2026-19111Insecure direct object reference in Strands Agents Tools memory tool namespace isolation

High 8.1

In plain English

A high-severity authorization bypass via user-controlled key in strands-agents-tools from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.5%top 55.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
AWS	strands-agents-tools	0 – before 0.8.3

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

References

https://pypi.org/project/strands-agents-tools/0.8.3/ release-notes, patch
https://aws.amazon.com/security/security-bulletins/2026-077-aws/ vendor-advisory
https://github.com/strands-agents/tools/security/advisories/GHSA-mpxq-953j-42m4 release-notes