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CVE-2026-27880— OpenFeature evaluation API reads input data with no bounds

Quick assessment

Affected
Grafana Grafana
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Grafana OpenFeature是Grafana开源的一个支持特性开关标准化接入与管理的扩展组件。 Grafana OpenFeature存在安全漏洞，该漏洞源于功能切换评估端点将无界值读入内存，可能导致内存不足崩溃。

CVSS 7.5 · High EPSS 0.63% · P48

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 4

VendorProduct Version RangeStatus
Grafana Grafana v12.1.0< v12.1.10 affected
v12.2.0< v12.2.8 affected
v12.3.0< v12.3.6 affected
v12.4.0< v12.4.2 affected
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I. Basic Information for CVE-2026-27880

Vulnerability Information
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Vulnerability Title
OpenFeature evaluation API reads input data with no bounds
Source: CVE Program / CVE List V5
Vulnerability Description
The OpenFeature feature toggle evaluation endpoint reads unbounded values into memory, which can cause out-of-memory crashes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Grafana OpenFeature 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grafana OpenFeature是Grafana开源的一个支持特性开关标准化接入与管理的扩展组件。 Grafana OpenFeature存在安全漏洞，该漏洞源于功能切换评估端点将无界值读入内存，可能导致内存不足崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Grafana Grafana v12.1.0 ~ v12.1.10 -

II. Public POCs for CVE-2026-27880

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III. Intelligence Information for CVE-2026-27880

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Same Patch Batch · Grafana · 2026-03-27 · 5 CVEs total

CVE-2026-27876 9.1 CRITICAL RCE on Grafana via sqlExpressions
CVE-2026-27877 6.5 MEDIUM Public dashboards discloses all direct mode datasources
CVE-2026-27879 6.5 MEDIUM Query resampling can cause unbounded memory allocations
CVE-2026-28375 6.5 MEDIUM Grafana Testdata datasource can issue unbounded memory allocations

IV. Related Vulnerabilities

Same product: Grafana
Same vendor: Grafana

V. Comments for CVE-2026-27880

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