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I. Basic Information for CVE-2026-31866
Vulnerability Information

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Vulnerability Title
Allocation of Resources Without Limits or Throttling in flagd
Source: NVD (National Vulnerability Database)
Vulnerability Description
flagd is a feature flag daemon with a Unix philosophy. Prior to 0.14.2, flagd exposes OFREP (/ofrep/v1/evaluate/...) and gRPC (evaluation.v1, evaluation.v2) endpoints for feature flag evaluation. These endpoints are designed to be publicly accessible by client applications. The evaluation context included in request payloads is read into memory without any size restriction. An attacker can send a single HTTP request with an arbitrarily large body, causing flagd to allocate a corresponding amount of memory. This leads to immediate memory exhaustion and process termination (e.g., OOMKill in Kubernetes environments). flagd does not natively enforce authentication on its evaluation endpoints. While operators may deploy flagd behind an authenticating reverse proxy or similar infrastructure, the endpoints themselves impose no access control by default. This vulnerability is fixed in 0.14.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenFeature flagd 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenFeature flagd是OpenFeature公司的一个守护进程。 flagd 0.14.2之前版本存在安全漏洞,该漏洞源于对请求负载中的评估上下文无大小限制,可能导致内存耗尽和进程终止。
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
VendorProductAffected VersionsCPESubscribe
open-featureflagd < 0.14.2 -
II. Public POCs for CVE-2026-31866
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III. Intelligence Information for CVE-2026-31866
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