CVE-2026-19311- Missing Authorization in OpenSearch Alerting Plugin
Bulletin ID: 2026-078-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/12/2026 11:30 AM PDT Description: OpenSearch is a community-driven, open-source search and analytics suite. We identified CVE-2026-19311, a missing authorization issue in the Execute Monitor API of the OpenSearch Alerting plugin. This issue may allow an authenticated user with the alerting_full_access role to read, modify, or delete arbitrary index data via a crafted inline monitor request with unintentional data source and input index parameters. Impacted versions: OpenSearch Alerting Plugin (open-source, self-managed): - Affected: 2.4.0 through 2.19.5, 3.0.0 through 3.7.0 - Fixed: 2.19.6, 3.8.0 Amazon OpenSearch Service (AWS Managed): - Affected: All domains running engine versions 2.4 through 3.5 - Fixed: Service software R20260428-P3 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CSIRTS triage
- What
- Missing authorization in the Execute Monitor API allows authenticated users with alerting_full_access role to read, modify, or delete arbitrary index data via crafted inline monitor requests.
- Who is affected
- Users running OpenSearch Alerting Plugin versions 2.4.0 through 2.19.5 or 3.0.0 through 3.7.0, and AWS OpenSearch Service domains running engine versions 2.4 through 3.5.
- Urgency
- Moderate; unpatched vulnerable versions allow privilege misuse by authenticated users with a specific role to access and modify sensitive data.
- Action
- Upgrade OpenSearch Alerting Plugin to version 2.19.6 or 3.8.0, or apply AWS OpenSearch Service software update R20260428-P3 or later.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://aws.amazon.com/security/security-bulletins/rss/2026-078-aws/
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-193110.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 35% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-19311 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
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