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

• Go github.com/juev/nebula-mesh: < 0.3.2 → fixed in 0.3.2

`internal/web/operators.go:251` — after `handleOperatorCreateAPIKey` mints a fresh 32-byte bearer token, the redirect points the operator's browser at: /ui/operators/?new_key=&key_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 ` 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//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 `operator_sessions` keyed by session token, with a `one_shot_token` column and `consumed_at`) or in a short-lived signed cookie. Render the key once inline on the detail page after the redirect, and clear the storage on render. Pattern mirrors the recovery-codes display in the TOTP flow. If the flash-storage refactor is too invasive, the minimal fix is to render the key inline via a `POST` → `200 OK with HTML` (no redirect), losing the post-redirect-get idiom but eliminating the URL exposure. Also fix `name` query encoding with `url.QueryEscape` regardless of which fix shape lands. CVSS estimate AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N — 5.5 (medium). AV:L because realistic exploit requires log-read access on shared infrastructure (proxy, CDN, browser-history backup) the operator's session touches.