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Advisory record · GHSA-9vp8-3hmv-8fgh

stigmem-node's federation peer registration lacked explicit out-of-band approval

CVSS 9.1 CriticalCriticalEPSS 0.0035 · 28th percentile

Critical, because:

  • CVSS score 9.1: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 29 May 2026, 22:18 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
stigmem-nodePyPI<0.9.0a20.9.0a2
Identifiers
GHSA-9vp8-3hmv-8fgh · CVE-2026-76242
Weakness (CWE)
CWE-295 · CWE-345
Tags
Published
29 May 2026
Updated
20 Aug 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

stigmem-node versions before 0.9.0a2 accept federation peer key material during registration without a separate administrator approval step based on an out-of-band fingerprint check. An attacker who can intercept or misdirect initial peer registration on the network could have a peer accepted. Upgrade to stigmem-node 0.9.0a2, which requires administrator approval using the expected fingerprint before peer tokens are accepted; until then, restrict peer registration endpoints to trusted administrative networks.

Written 5 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.1 Critical 4.0 CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0035, the 28th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:39 UTC First seen by agentprime
  2. 31 Oct 2026, 14:39 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.