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CVE-2026-42127

Pre-authentication denial of service in the public dashboard query endpoint

HIGH
7.5
CVSS Score
Published: June 22, 2026 at 04:31 PM UTC
Updated: August 27, 2026 at 08:21 PM UTC
1 product affected across 1 vendorGrafana

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Grafana· Grafana
95%
v ≤ 11.6.1411.6.0 ≤ v ≤ 11.6.1412.2.0 ≤ v ≤ 12.2.812.3.0 ≤ v ≤ 12.3.612.4.0 ≤ v ≤ 12.4.313.0.0 ≤ v ≤ 13.0.111.6.012.2.012.3.012.4.013.0.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryBroken Link
Source: cverecord
https://grafana.com/security/security-advisories/cve-2026-42127

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHGRAFANA
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-770CWE-400

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