CVE-2026-19111 Insecure direct object reference in Strands Agents Tools memory tool namespace isolation
Authenticated users can access or modify other tenants' memories by manipulating LLM tool calls in Strands Agents Tools.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19111?
CVE-2026-19111 is a high-severity missing authorization vulnerability in AWS strands-agents-tools, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-19111?
How do I fix CVE-2026-19111?
No fix has been published for CVE-2026-19111 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-19111 being exploited?
There is no known exploitation of CVE-2026-19111 in the wild and no public exploit code.
Sources
Also known as GHSA-mpxq-953j-42m4.