How severe is CVE-2026-19311?

CVE-2026-19311 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-19311 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-19311?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-19311 published?

CVE-2026-19311 was published on 2026-08-12 and last updated on 2026-08-13.

CVE-2026-19311

CVE-2026-19311 is a high-severity vulnerability with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-475.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v4: 8.6
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-475
Published: 2026-08-12
Last modified: 2026-08-13

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.

Frequently asked questions

What is CVE-2026-19311?: 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.
How severe is CVE-2026-19311?: CVE-2026-19311 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-19311 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-19311?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-19311 published?: CVE-2026-19311 was published on 2026-08-12 and last updated on 2026-08-13.

References

Other CWE-475 vulnerabilities

CVE-2026-42009 — High (CVSS 7.5): A flaw was found in gnutls. A remote attacker could exploit an issue in the Datagram Transport Layer Security (DTLS)…
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CVE-2024-10569 — High (CVSS 7.5): A vulnerability in the dataframe component of gradio-app/gradio (version git 98cbcae) allows for a zip bomb attack. The…
CVE-2024-20380 — High (CVSS 7.5): A vulnerability in the HTML parser of ClamAV could allow an unauthenticated, remote attacker to cause a denial of…
CVE-2024-3099 — Medium (CVSS 5.4): A vulnerability in mlflow/mlflow version 2.11.1 allows attackers to create multiple models with the same name by…
CVE-2023-52533 — Medium (CVSS 5.3): In modem-ps-nas-ngmm, there is a possible undefined behavior due to incorrect error handling. This could lead to remote…

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