How severe is CVE-2026-49089?

CVE-2026-49089 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-49089 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49089?

CVE-2026-49089 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49089?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-49089 published?

CVE-2026-49089 was published on 2026-08-13 and last updated on 2026-09-02.

CVE-2026-49089

CVE-2026-49089 is a medium-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 6.5. 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-770.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (39th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Elastic Kibana
Published: 2026-08-13
Last modified: 2026-09-02

Description

Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). A query expression accepted by a connector reporting operation was processed without any limit on its size, and an oversized expression caused the Kibana process to spend an unbounded amount of time evaluating it. An authenticated user with read-only privileges was able to send a single request that left Kibana unable to serve any user until the process was restarted.

Frequently asked questions

What is CVE-2026-49089?: Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). A query expression accepted by a connector reporting operation was processed without any limit on its size, and an oversized expression caused the Kibana process to spend an unbounded amount of time evaluating it. An authenticated user with read-only privileges was able to send a single request that left Kibana unable to serve any user until the process was restarted.
How severe is CVE-2026-49089?: CVE-2026-49089 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-49089 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (39th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49089?: CVE-2026-49089 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49089?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-49089 published?: CVE-2026-49089 was published on 2026-08-13 and last updated on 2026-09-02.

References

https://discuss.elastic.co/t/kibana-8-19-20-9-4-5-security-update-esa-2026-137/389511

Affected products (1)

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*

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