{"items":[{"id":"NVI-00018400","kind":"vulnerability","title":"nebula-mesh: Host advanced overrides allow YAML injection into agent config.yml","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-7hp6-g3pq-3pc3","CVE-2026-47722"],"plain_summary":"GitHub lists this reviewed advisory for github.com/juev/nebula-mesh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-1d1c55f08d07785c4b54b423b5729514"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-1d1c55f08d07785c4b54b423b5729514","url":"https://github.com/advisories/GHSA-7hp6-g3pq-3pc3","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-7hp6-g3pq-3pc3","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:51:53.608Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-1d1c55f08d07785c4b54b423b5729514"],"technology":"github.com/juev/nebula-mesh","known_exclusions":[],"conditions_summary":"`internal/configgen/generator.go:86,108,119` interpolates the operator-supplied `ListenHost` and `TunDevice` fields raw into a `text/template` that produces the agent's `config.yml`. `internal/web/advanced.go:20-35` accepts both with only `strings.TrimSpace` — no character or shape validation.\n\n## Exploit\nAn operator (or attacker with any operator key, given the cross-tenant CRUD advisory) sets `adv_tun_device` to:\n\n```\nnebula0\nlighthouse:\n  am_lighthouse: true\n  hosts: [\"10.0.0.1\"]\n#\n```\n\nThe agent fetches the rendered config on its next signed poll. On config reload, it loads the injected YAML keys: the host self-promotes to lighthouse, attracts mesh traffic, or sets `am_relay: true` to be selected as a relay. The `ListenHost` field has the same shape.\n\n## Affected\nAll released versions prior to v0.3.2.\n\n## Threat model\n- **Today**: operator can compromise their own host's config (trivially allowed if they own the host, but they can also set lighthouse/relay flags that the operator-create form does NOT expose — privilege uplift within their own tenant).\n- **Combined with the critical /api/v1 authz advisory**: any operator key can mutate ANOTHER tenant's host overrides and inject ","public_affected_ranges":["< 0.3.2"]}],"null_published_at":"2026-11-07T07:07:39.832Z","source_updated_at":"2026-06-08T23:08:18.000Z","source_disclosed_at":"2026-06-08T23:08:15.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-07T00:51:53.608Z"}],"next_cursor":null,"snapshot_revision":"42594"}