CVE-2026-42127: CWE-400 in Grafana Grafana Enterprise
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.
AI Analysis
Technical Summary
The vulnerability in Grafana Enterprise's public dashboard query endpoint arises from the lack of request body size limitation before processing. This allows unauthenticated attackers to send very large JSON payloads, triggering excessive memory allocation. The resulting memory exhaustion can cause denial of service conditions. The vulnerability is identified as CWE-400 (Uncontrolled Resource Consumption) and CWE-770 (Allocation of Resources Without Limits or Throttling). The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service). Affected versions explicitly include 11.6.0, 12.2.0, 12.3.0, 12.4.0, and 13.0.0 of Grafana Enterprise. There is no vendor advisory or patch information available at this time, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation allows unauthenticated attackers to cause denial of service by exhausting server memory through large JSON payloads sent to the public dashboard query endpoint. This disrupts availability of the Grafana Enterprise service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing network-level protections such as limiting request body sizes or rate limiting access to the affected endpoint. Monitor for updates from Grafana regarding official patches or mitigations.
CVE-2026-42127: CWE-400 in Grafana Grafana Enterprise
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.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Grafana Enterprise's public dashboard query endpoint arises from the lack of request body size limitation before processing. This allows unauthenticated attackers to send very large JSON payloads, triggering excessive memory allocation. The resulting memory exhaustion can cause denial of service conditions. The vulnerability is identified as CWE-400 (Uncontrolled Resource Consumption) and CWE-770 (Allocation of Resources Without Limits or Throttling). The CVSS 3.1 base score is 7.5, indicating high severity, with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service). Affected versions explicitly include 11.6.0, 12.2.0, 12.3.0, 12.4.0, and 13.0.0 of Grafana Enterprise. There is no vendor advisory or patch information available at this time, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation allows unauthenticated attackers to cause denial of service by exhausting server memory through large JSON payloads sent to the public dashboard query endpoint. This disrupts availability of the Grafana Enterprise service. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider implementing network-level protections such as limiting request body sizes or rate limiting access to the affected endpoint. Monitor for updates from Grafana regarding official patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GRAFANA
- Date Reserved
- 2026-04-24T15:38:08.066Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a39735aeed863c81e396223
Added to database: 06/22/2026, 17:39:38 UTC
Last enriched: 08/02/2026, 20:34:58 UTC
Last updated: 08/06/2026, 12:41:10 UTC
Views: 188
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