# GO-2026-4279 - flagd: Multiple Go Runtime CVEs Impact Security and Availability in github.com/open-feature/flagd/core

Source: https://junglewise.ai/threats/go-2026-4279-flagd-multiple-go-runtime-cves-impact-security-and-aa56e603  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-01-12  
License: CC BY 4.0 with a link back

Severity: info · Published 2026-01-12

flagd: Multiple Go Runtime CVEs Impact Security and Availability in github.com/open-feature/flagd/core

Technologies: [github.com/open-feature/flagd/flagd (Go)](https://junglewise.ai/threats/technologies/github-com-open-feature-flagd-flagd). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Informational severity, published 12 January 2026.

**Which products and versions are affected?** github.com/open-feature/flagd/core (Go) SEMVER:introduced=0,fixed=0.13.1; github.com/open-feature/flagd/flagd (Go) SEMVER:introduced=0,fixed=0.13.1; github.com/open-feature/flagd/flagd-proxy (Go) SEMVER:introduced=0,fixed=0.8.2.

**Is there a fix for This vulnerability?** Yes. github.com/open-feature/flagd/core (Go): upgrade to 0.13.1 or later; github.com/open-feature/flagd/flagd (Go): upgrade to 0.13.1 or later; github.com/open-feature/flagd/flagd-proxy (Go): upgrade to 0.8.2 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected?** Check whether you run github.com/open-feature/flagd/core (Go), github.com/open-feature/flagd/flagd (Go) or github.com/open-feature/flagd/flagd-proxy (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- github.com/open-feature/flagd/core (Go): upgrade to 0.13.1 or later

  ```sh
  go get github.com/open-feature/flagd/core@v0.13.1
  ```

- github.com/open-feature/flagd/flagd (Go): upgrade to 0.13.1 or later

  ```sh
  go get github.com/open-feature/flagd/flagd@v0.13.1
  ```

- github.com/open-feature/flagd/flagd-proxy (Go): upgrade to 0.8.2 or later

  ```sh
  go get github.com/open-feature/flagd/flagd-proxy@v0.8.2
  ```


## Affected products

- github.com/open-feature/flagd/core (Go) SEMVER:introduced=0,fixed=0.13.1
- github.com/open-feature/flagd/flagd (Go) SEMVER:introduced=0,fixed=0.13.1
- github.com/open-feature/flagd/flagd-proxy (Go) SEMVER:introduced=0,fixed=0.8.2

## Related threats

- [GO-2026-4674 - flagd Vulnerable to Allocation of Resources Without Limits or Throttling in github.com/open-feature/flagd/flagd](https://junglewise.ai/threats/cve-2026-31866-flagd-vulnerable-to-allocation-of-resources-without-limits-or)
- [flagd: Multiple Go Runtime CVEs Impact Security and Availability](https://junglewise.ai/threats/flagd-multiple-go-runtime-cves-impact-security-and-availability-0ec5848f)