{"items":[{"id":"NVI-00014995","kind":"vulnerability","title":"OliveTin: Unauthenticated DoS via OAuth2 State Memory Exhaustion (Unbounded Map Growth)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-xpxj-f2fm-rqch","CVE-2026-67437"],"plain_summary":"GitHub lists this reviewed advisory for github.com/OliveTin/OliveTin. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0347ec84f7fd4267d97572029a06a48b"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-30T14:24:55.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-0347ec84f7fd4267d97572029a06a48b"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-0347ec84f7fd4267d97572029a06a48b","url":"https://github.com/advisories/GHSA-xpxj-f2fm-rqch","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-xpxj-f2fm-rqch","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T09:58:49.818Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0347ec84f7fd4267d97572029a06a48b"],"technology":"github.com/OliveTin/OliveTin","known_exclusions":[],"conditions_summary":"## Summary\n\nOliveTin's OAuth2 login handler stores per-login state in an in-memory map (`registeredStates`) that grows unboundedly. States are added on every `/oauth/login` request but are **never deleted or expired**. An unauthenticated attacker can send millions of requests to `/oauth/login` to fill the map with state entries, exhausting server memory and causing a denial of service.\n\nThis is **distinct from CVE-2026-28789** (concurrent map writes crash). That CVE was about the panic from unsynchronized map access — the fix added a `sync.RWMutex`. This vulnerability is about the **unbounded growth** of the map even WITH the mutex, as no cleanup mechanism exists.\n\n## Affected Versions\n\n- All versions with OAuth2 support, including >= 3000.10.3 (which patched CVE-2026-28789)\n\n## Details\n\nIn `service/internal/auth/otoauth2/restapi_auth_oauth2.go`:\n\n```go\ntype OAuth2Handler struct {\n    cfg                 *config.Config\n    mu                  sync.RWMutex\n    registeredStates    map[string]*oauth2State  // NEVER cleaned up\n    registeredProviders map[string]*oauth2.Config\n}\n```\n\nThe `HandleOAuthLogin` handler adds a new state on every request:\n\n```go\nfunc (h *OAuth2Handler) HandleO","public_affected_ranges":[">= 0.0.0-20251024001301-45f9c18bc3ee, < 0.0.0-20260708075951-ec114e95d297"]}],"null_published_at":"2026-11-03T10:03:26.532Z","source_updated_at":"2026-07-30T14:24:55.000Z","source_disclosed_at":"2026-07-30T14:24:53.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-03T09:58:49.818Z"}],"next_cursor":null,"snapshot_revision":"42594"}