CVE-2026-19311

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
37(Track)
EG Risk 37/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 13, 2026

Advisory Details (3)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

CVE-2026-19311- Missing Authorization in OpenSearch Alerting Plugin

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

Improper authorization of Execute Monitor API · Advisory · opensearch-project/alerting · GitHub

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

Amazon OpenSearch Service now supports OpenSearch version 3.5 - AWS

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

Vendor Advisories for CVE-2026-19311(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 34× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-19 23:42 UTCEG score recompute
  2. 2026-08-19 23:42 UTCGHSA enrichment
  3. 2026-08-19 17:03 UTCEPSS rescore
  4. 2026-08-19 12:52 UTCGHSA enrichment
  5. 2026-08-19 02:03 UTCGHSA enrichment
  6. 2026-08-18 15:13 UTCEG score recompute
  7. 2026-08-18 15:13 UTCGHSA enrichment
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-18 03:41 UTCGHSA enrichment
  10. 2026-08-17 16:52 UTCEG score recompute
  11. 2026-08-17 16:52 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-17 06:02 UTCGHSA enrichment
  14. 2026-08-16 19:11 UTCEG score recompute
  15. 2026-08-16 19:11 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 08:22 UTCEG score recompute
  18. 2026-08-16 08:22 UTCGHSA enrichment
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 21:33 UTCGHSA enrichment
  21. 2026-08-15 10:44 UTCEG score recompute
  22. 2026-08-15 10:44 UTCGHSA enrichment
  23. 2026-08-15 01:30 UTCEPSS rescore
  24. 2026-08-14 23:55 UTCGHSA enrichment
  25. 2026-08-14 13:06 UTCGHSA enrichment
Show 12 more
  1. 2026-08-14 02:16 UTCEG score recompute
  2. 2026-08-14 02:16 UTCGHSA enrichment
  3. 2026-08-13 22:00 UTCEPSS rescore
  4. 2026-08-13 15:27 UTCEG score recompute
  5. 2026-08-13 15:27 UTCGHSA enrichment
  6. 2026-08-13 15:15 UTCEG score recompute
  7. 2026-08-13 15:15 UTCGHSA enrichment
  8. 2026-08-13 07:49 UTCEG score recompute
  9. 2026-08-13 07:49 UTCGHSA enrichment
  10. 2026-08-12 19:19 UTCEG score recompute
  11. 2026-08-12 18:56 UTCEG score recompute
  12. 2026-08-12 18:55 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19311?
CVE-2026-19311 is a high vulnerability published on August 12, 2026. 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.
When was CVE-2026-19311 disclosed?
CVE-2026-19311 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19311 actively exploited?
CVE-2026-19311 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.2% of all scored CVEs.
What is the CVSS score of CVE-2026-19311?
CVE-2026-19311 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-19311?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19311, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-19311

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