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Advisory record · GHSA-7hp6-g3pq-3pc3

nebula-mesh: Host advanced overrides allow YAML injection into agent config.yml

CVSS 8.7 HighEPSS 0.0047 · 41st percentile

Published by the GitHub Advisory Database at 8 Jun 2026, 23:08 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/juev/nebula-meshGo<0.3.20.3.2
Identifiers
GHSA-7hp6-g3pq-3pc3 · CVE-2026-47722 · GO-2026-5223
Weakness (CWE)
CWE-94
Tags
Published
8 Jun 2026
Updated
25 Jun 2026

Machine-written summary

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

GHSA-7hp6-g3pq-3pc3: nebula-mesh versions before 0.3.2 interpolate the ListenHost and TunDevice operator settings into a text template that generates the agent's config.yml without validation, so an operator can inject YAML keys. An attacker with an operator key can then alter agent behavior, such as promoting a host to lighthouse or relay, and the source notes this can reach other tenants' hosts when combined with a separate authorization flaw. Upgrade to version 0.3.2, which is the fixed release.

Written 7 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
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 41st percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:07 UTC First seen by agentprime
  2. 31 Oct 2026, 15:07 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.