---
id: CVE-2026-76242
title: >-
  stigmem-node 0.9.0a1 accepts federation peer key material during peer
  registration without a separate administrator out-of-band fingerprint approval
  step
summary: >-
  stigmem-node 0.9.0a1 accepts federation peer key material during peer
  registration without a separate administrator out-of-band fingerprint approval
  step. On nodes that accept federation peer registration over a network where
  initial reg…
severity: critical
cwe:
  - CWE-295
vendor: stigmem-node
product: stigmem-node
affected:
  - stigmem-node < 0.9.0a2
patched:
  - stigmem-node 0.9.0a2
published: '2026-08-19'
updated: '2026-09-11'
sourceUpdated: '2026-09-11T18:28:15.520'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76242'
references:
  - url: >-
      https://github.com/eidetic-labs/stigmem/security/advisories/GHSA-9vp8-3hmv-8fgh
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/stigmem-federation-peer-registration-authentication-bypass
    label: disclosure@vulncheck.com
  - url: 'https://github.com/eidetic-labs/stigmem'
  - url: 'https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/CHANGELOG.md#L14-L35'
  - url: 'https://github.com/eidetic-labs/stigmem/blob/v0.9.0a2/SECURITY.md'
  - url: 'https://github.com/eidetic-labs/stigmem/releases/tag/v0.9.0a2'
tags:
  - nvd
  - osv
  - pip
epss: 0.00346
epssPercentile: 0.25313
aliases:
  - GHSA-9vp8-3hmv-8fgh
ecosystem: pip
ingestedAt: '2026-08-20T19:23:05.694Z'
---

## Overview

stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administrator out-of-band fingerprint approval step. On nodes that accept federation peer registration over a network where initial registration can be intercepted or misdirected, an attacker can register a malicious peer and gain access to or tamper with federation traffic. Fixed in 0.9.0a2, which introduces a pending approval flow requiring administrator fingerprint verification before peer tokens are accepted.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-76242)

Affected packages:

- `stigmem-node < 0.9.0a2`

Patched in:

- `stigmem-node 0.9.0a2`

Source: https://osv.dev/vulnerability/GHSA-9vp8-3hmv-8fgh