CVE-2026-19311

high

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.

References

https://aws.amazon.com/security/security-bulletins/2026-078-aws/

https://github.com/opensearch-project/alerting/security/advisories/GHSA-xxpg-q3wh-685q

https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-opensearch-service-version-3-5/

Details

Source: Mitre, NVD

Published: 2026-08-12

Updated: 2026-08-13

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.1

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Severity: High

CVSS v4

Base Score: 8.6

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00415