PT-2026-48602 · Go · Github.Com/Juev/Nebula-Mesh

Published

2026-06-10

·

Updated

2026-06-10

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CVE-2026-47768

CVSS v3.1

5.5

Medium

VectorAV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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 <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 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 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.

Fix

Insertion into Log File

Improper Encoding or Escaping of Output

Weakness Enumeration

CWE-532CWE-598CWE-116

Related Identifiers

CVE-2026-47768
GHSA-9PG3-25FQ-P6CC

Affected Products

Github.Com/Juev/Nebula-Mesh