Vulnerability · Published Mar 11, 2026 · Assigned by GitHub_M
CVE-2026-31866Allocation of Resources Without Limits or Throttling in flagd
High 7.5
In plain English
A high-severity resource allocation without limits in flagd from open-feature. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/open-feature/flagd/flagd | 0.14.2 | GHSA-rmrf-g9r3-73pm |
| Go | github.com/open-feature/flagd/flagd | 0.14.2 | GO-2026-4674 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| open-feature | flagd | < 0.14.2 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H