vulnerability / NVI-00016441 / Revision 1
nebula-mesh: Unauthenticated OIDC login endpoint allocates unbounded in-memory state entries without rate limiting
GitHub lists this reviewed advisory for github.com/forgekeep/nebula-mesh. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
5.3 medium
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/forgekeep/nebula-mesh
source listed>= 0.2.0, < 0.5.0
### Summary 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. ### Details The OIDC login route is registered directly by `WithOIDC`: - `internal/web/web.go:153` registers `w.router.Get("/ui/oidc/login", o.HandleLogin)`. - `internal/web/web.go:154` rate-limits only `GET /ui/oidc/callback` with `w.rateLimitMiddleware("auth")`. The normal `/ui/*` route group applies rate limiting to login/register form submissions, but this direct registration happens outside that group: - `internal/web/web.go:287` through `internal/web/web.go:292` show the rate-limited local login, TOTP, and register POST routes. The OIDC login handler allocates persistent server-side state before redirecting to the configured identity provider: - `intern
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
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05 / Provenance
Sources you can inspect
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- GHSA-m3cx-mwpg-32jg ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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