How severe is CVE-2026-42127?

CVE-2026-42127 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-42127 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.

What products are affected by CVE-2026-42127?

CVE-2026-42127 affects Grafana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42127?

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.

Does CVE-2026-42127 have an EU (EUVD) identifier?

Yes. CVE-2026-42127 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38309.

When was CVE-2026-42127 published?

CVE-2026-42127 was published on 2026-06-22 and last updated on 2026-06-30.

CVE-2026-42127

CVE-2026-42127 is a high-severity vulnerability in Grafana with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38309
Weakness: CWE-770
Affected product: Grafana
Published: 2026-06-22
Last modified: 2026-06-30

Description

The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.

Frequently asked questions

What is CVE-2026-42127?: The public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.
How severe is CVE-2026-42127?: CVE-2026-42127 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-42127 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.
What products are affected by CVE-2026-42127?: CVE-2026-42127 affects Grafana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42127?: 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.
Does CVE-2026-42127 have an EU (EUVD) identifier?: Yes. CVE-2026-42127 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38309.
When was CVE-2026-42127 published?: CVE-2026-42127 was published on 2026-06-22 and last updated on 2026-06-30.

References

https://grafana.com/security/security-advisories/cve-2026-42127

Affected products (1)

cpe:2.3:a:grafana:grafana:*:*:*:*:enterprise:*:*:*

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