Vulnerability-Lookup

CVE-2026-19311 (GCVE-0-2026-19311)

Vulnerability from cvelistv5 – Published: 2026-08-12 18:34 – Updated: 2026-08-13 14:53

Title

Missing Authorization in Execute Monitor API in OpenSearch Alerting Plugin

Summary

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.

Severity

8.6 (High)


                        
                          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

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 14:52 UTC

CWE

CWE-475 - Undefined behavior for input to API

Assigner

AMZN

References

3 references

URL	Tags
https://aws.amazon.com/about-aws/whats-new/2026/0…	release-notes
https://github.com/opensearch-project/alerting/se…	release-notespatch
https://aws.amazon.com/security/security-bulletin…	vendor-advisory

Impacted products

2 products

Vendor	Product	Version
AWS	OpenSearch	Affected: 2.4 , ≤ 3.5 (custom)
Github	OpenSearch	Affected: 2.4.0 , ≤ 2.19.5 (custom) Affected: 3.0.0 , ≤ 3.7.0 (custom)

Show details on NVD website

JSON

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    "dateReserved": "2026-08-07T17:50:37.734Z",
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  }
}

GHSA-4V32-VRP2-28JP

Vulnerability from github – Published: 2026-08-12 21:31 – Updated: 2026-08-12 21:31

Details

Severity

8.1 (High)


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

8.6 (High)


                  
                    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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-19311"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-475"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-12T19:17:31Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-4v32-vrp2-28jp",
  "modified": "2026-08-12T21:31:39Z",
  "published": "2026-08-12T21:31:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/opensearch-project/alerting/security/advisories/GHSA-xxpg-q3wh-685q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19311"
    },
    {
      "type": "WEB",
      "url": "https://aws.amazon.com/about-aws/whats-new/2026/03/amazon-opensearch-service-version-3-5"
    },
    {
      "type": "WEB",
      "url": "https://aws.amazon.com/security/security-bulletins/2026-078-aws"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-19311 (GCVE-0-2026-19311)

GHSA-4V32-VRP2-28JP

Tags

Sightings

Nomenclature