---
title: "GHSA-84c3-j8r2-mcm8: @nfid/embed has compromised private key due to @dfinity/auth-client producing insecure session keys"
url: https://erroneo.us/security/ghsa/GHSA-84c3-j8r2-mcm8/
description: "GHSA-84c3-j8r2-mcm8 (critical, npm): @nfid/embed has compromised private key due to @dfinity/auth-client producing insecure session keys. Problem User…"
type: advisory
section: "Security Digest"
date_published: 2024-02-26
date_modified: 2026-03-15
publisher: erroneo.us
author: erroneo.us Security Desk
ghsa: "GHSA-84c3-j8r2-mcm8"
license: All rights reserved. Quote with attribution and a link.
---

# GHSA-84c3-j8r2-mcm8: @nfid/embed has compromised private key due to @dfinity/auth-client producing insecure session keys

## Affected packages

- npm `@nfid/embed` >= 0.10.0, < 0.10.1-alpha.6 → fixed: 0.10.1-alpha.6

## Details

Problem User sessions in the @nfid/embed SDK with Ed25519 keys are vulnerable due to a compromised private key 535yc-uxytb-gfk7h-tny7p-vjkoe-i4krp-3qmcl-uqfgr-cpgej-yqtjq-rqe. This exposes users to potential loss of funds on ledgers and unauthorized access to canisters they control. Solution Using version >1.0.1 of @dfinity/auth-client and @dfinity/identity packages, or @nfid/embed >0.10.1-alpha.6 includes patched versions of the issue. User sessions will be automatically fixed when they re-authenticate. Why this happened The DFINITY auth client library provides a function, Ed25519KeyIdentity.generate, for generating an Ed25519 key pair. This function includes an optional parameter to supply a 32-byte seed value, which will be utilized as the secret key. In cases where no seed value is provided, the library is expected to generate the secret key using secure randomness. However, a recent update of DFINITY libraries has compromised this assurance by employing an insecure seed for key pair generation. References AgentJS CVE

## Sources

- [GitHub Advisory GHSA-84c3-j8r2-mcm8](https://github.com/advisories/GHSA-84c3-j8r2-mcm8)
- [github.com](https://github.com/dfinity/agent-js/security/advisories/GHSA-c9vv-fhgv-cjc3)
- [github.com](https://github.com/internet-identity-labs/sdk-ts/security/advisories/GHSA-84c3-j8r2-mcm8)

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Source page: https://erroneo.us/security/ghsa/GHSA-84c3-j8r2-mcm8/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt