CVE Watch4 sept 2026

CVE-2026-55512

nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.2.0 to before version 0.5.0, when OIDC is enabled, GET

CVSS

5.3

Medio

EPSS

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KEV

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Exploit Today

0-100

Publicado: 4 sept 2026 · Última mod.: 4 sept 2026 · CWE-400

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. From version 0.2.0 to before version 0.5.0, when OIDC is enabled, GET /ui/oidc/login is reachable without authentication and is registered outside the Web UI rate-limited auth routes. Every request creates a fresh random OIDC state value and stores it in an in-memory map for 10m. Expired states are swept lazily, but there is no rate limit or maximum live-state cap on the allocation path. An unauthenticated remote client can therefore grow OIDC.states for the full state TTL, bounded by request throughput rather than by configured auth rate limits. This issue has been patched in version 0.5.0.

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