{"items":[{"id":"NVI-00018268","kind":"vulnerability","title":"Nitro has an Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-9phm-9p8f-hw5m","CVE-2026-44372"],"plain_summary":"GitHub lists this reviewed advisory for nitro, nitropack. 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-040893775390c6c04d5a86664b1b29b9"],"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":"2026-06-09T01:58:51.000Z","value":"6.1 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-040893775390c6c04d5a86664b1b29b9"}],"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-040893775390c6c04d5a86664b1b29b9","url":"https://github.com/advisories/GHSA-9phm-9p8f-hw5m","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-9phm-9p8f-hw5m","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T20:58:31.464Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-040893775390c6c04d5a86664b1b29b9"],"technology":"nitro","known_exclusions":[],"conditions_summary":"A redirect route rule like:\n\n```ts\nrouteRules: {\n  \"/legacy/**\": { redirect: \"/**\" }\n}\n```\n\nis intended to rewrite paths within the same host. Before the patch, an attacker could turn the rewrite into a cross-host redirect by sliding an extra slash in after the rule prefix. Example exploit:\n\n```\nGET /legacy//evil.com\n```\n\nNitro stripped `/legacy` from the matched pathname and joined the remainder against the rule's target. The remainder was `//evil.com`, which the join preserved verbatim, so Nitro responded with `Location: //evil.com`. Browsers resolve `//evil.com` as a protocol-relative URL against the current scheme, sending the user to `https://evil.com`. \n\n### Are you affected?\n\nUsers may be affected if **all** of the following are true:\n\n1. Their project uses Nitro's `routeRules` with a `redirect` entry.\n2. The target uses a `/**` wildcard suffix to forward sub-paths (e.g. `redirect: \"/**\"`, `redirect: \"/new/**\"`, `proxy: { to: \"http://upstream/**\" }`).\n3. The `redirect` rule is _not_ handled natively at the CDN layer. The `vercel`, `netlify`, `cloudflare-pages`, and `edgeone` presets translate `routeRules.redirect` into platform config (`vercel.json`, `_redirects`, EdgeOne v3","public_affected_ranges":["< 3.0.260429-beta"]},{"certainty":"source_listed","source_ids":["sr-040893775390c6c04d5a86664b1b29b9"],"technology":"nitropack","known_exclusions":[],"conditions_summary":"A redirect route rule like:\n\n```ts\nrouteRules: {\n  \"/legacy/**\": { redirect: \"/**\" }\n}\n```\n\nis intended to rewrite paths within the same host. Before the patch, an attacker could turn the rewrite into a cross-host redirect by sliding an extra slash in after the rule prefix. Example exploit:\n\n```\nGET /legacy//evil.com\n```\n\nNitro stripped `/legacy` from the matched pathname and joined the remainder against the rule's target. The remainder was `//evil.com`, which the join preserved verbatim, so Nitro responded with `Location: //evil.com`. Browsers resolve `//evil.com` as a protocol-relative URL against the current scheme, sending the user to `https://evil.com`. \n\n### Are you affected?\n\nUsers may be affected if **all** of the following are true:\n\n1. Their project uses Nitro's `routeRules` with a `redirect` entry.\n2. The target uses a `/**` wildcard suffix to forward sub-paths (e.g. `redirect: \"/**\"`, `redirect: \"/new/**\"`, `proxy: { to: \"http://upstream/**\" }`).\n3. The `redirect` rule is _not_ handled natively at the CDN layer. The `vercel`, `netlify`, `cloudflare-pages`, and `edgeone` presets translate `routeRules.redirect` into platform config (`vercel.json`, `_redirects`, EdgeOne v3","public_affected_ranges":["< 2.13.4"]}],"null_published_at":"2026-11-07T07:07:39.798Z","source_updated_at":"2026-06-09T01:58:51.000Z","source_disclosed_at":"2026-05-06T23:02:45.000Z","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":"2026-11-06T20:58:31.464Z"}],"next_cursor":null,"snapshot_revision":"42594"}