EUVD-2026-342181

fkie_cve-2026-47768

nebula-mesh is a self-hosted control plane for Slack Nebula mesh virtual private network. Prior to version 0.3.2, newly-minted operator API key exposed in redirect URL (Referer, history, proxy logs). This issue has been patched in version 0.3.2.

GHSA-9pg3-25fq-p6cc — nebula-mesh: Newly-minted operator API key exposed in redirect URL (Referer, history, proxy logs)

Affected: Go: github.com/juev/nebula-mesh

`internal/web/operators.go:251` — after `handleOperatorCreateAPIKey` mints a fresh 32-byte bearer token, the redirect points the operator's browser at:

/ui/operators/<id>?new_key=<raw-token>&key_name=<name>

The raw API key ends up: - in the browser's URL history - in the `Referer` header on every cross-origin asset the detail page loads (any third-party SVG/CSS/JS resource the layout pulls in) - in any reverse-proxy or load-balancer access log on the path (nginx default `combined` log captures the query string) - in any structured log sink the operator's local browser-history backup tool ships out

`Authorization: Bearer <token>` headers go through the same hops without these problems because access logs typically don't capture request headers and the browser doesn't replay headers cross-origin.

Same handler also appends `name` (`r.FormValue("name")`) to the query string without `url.QueryEscape`, so an `&` in the operator-supplied key name corrupts query parsing and a `\r\n` in older proxies could split response headers.

## Affected All released versions up to v0.3.1.

## Reproducer As admin, create an API key via `/ui/operators/<id>/api-keys` (form POST). The 303 Location header carries the raw token in the query string. Open browser DevTools → Network → response headers; or check the reverse-proxy access log; or check the operator-detail page's `Referer`-emitting fetches.

## Suggested fix Stash the raw key in a one-shot server-side flash storage (e.g., a row in `…

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EUVD-2026-342181

fkie_cve-2026-47768

GHSA-9pg3-25fq-p6cc — nebula-mesh: Newly-minted operator API key exposed in redirect URL (Referer, history, proxy logs)