CVE-2026-19311 Missing Authorization in Execute Monitor API in OpenSearch Alerting Plugin
Authenticated users can read, modify, or delete arbitrary index data via the Execute Monitor API due to missing authorization checks.
- 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-2026-19311?
CVE-2026-19311 is a high-severity missing authorization vulnerability in AWS OpenSearch, published on 12 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Missing authorization in the Execute Monitor API in Amazon OpenSearch Alerting plugin might allow an authenticated remote user to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data source and input index parameters.
Weakness: CWE-475
Which versions are affected by CVE-2026-19311?
How do I fix CVE-2026-19311?
No fix has been published for CVE-2026-19311 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-2026-19311 being exploited?
There is no known exploitation of CVE-2026-19311 in the wild and no public exploit code.
Sources
Also known as GHSA-4v32-vrp2-28jp, GHSA-xxpg-q3wh-685q.