{"id":"GHSA-qhv3-wjg8-6fx6","revision":null,"records":[{"revision":"ea88428fa0fe4b3aaea408a864cf1ec8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48151","aliases":[],"title":"Budibase: Webhook schema endpoint authorization bypass allows unauthenticated mutation of webhook and automation schema","description":"Budibase is an open-source low-code platform. Prior to 3.39.0, the webhook schema-building endpoint is registered under builderRoutes, but the generic authorization middleware skips authorization for all paths matching /api/webhooks/schema. As a result, an unauthenticated caller can update the body schema for a known webhook and mutate the corresponding automation trigger output schema. This vulnerability is fixed in 3.39.0.","state":0,"publishedAt":"2026-05-27T16:57:36.447+00:00","modifiedAt":"2026-05-28T14:12:26.911+00:00","affected":[{"ecosystem":"Vendor product","name":"budibase","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Budibase\",\n                    \"product\": \"budibase\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 3.39.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-qhv3-wjg8-6fx6"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48151","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48151","identifiers":["CVE-2026-48151"]},"retained":false,"historicalAffected":[]},{"revision":"a2dc19f89d9c4f9fb64a9fa5041d3329","observedAt":"2026-11-13T13:58:56.406+00:00","statement":{"source":"euvd","id":"EUVD-2026-32589","aliases":["CVE-2026-48151","GHSA-qhv3-wjg8-6fx6"],"title":"Budibase is an open-source low-code platform. 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This vulnerability is fixed in 3.39.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":null}],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-qhv3-wjg8-6fx6"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-32589","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"May 27, 2026, 4:57:36 PM","dateUpdated":"May 28, 2026, 2:12:26 PM"},"relatedAdvisories":[{"id":"WID-SEC-W-2026-1629","title":"Budibase: Mehrere Schwachstellen","vulnerabilityIds":["CVE-2026-48128","CVE-2026-48146","CVE-2026-48147","CVE-2026-48148","CVE-2026-48149","CVE-2026-48150","CVE-2026-48151","CVE-2026-48152","CVE-2026-48153"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Prior to 3.39.0, the webhook schema-building endpoint is registered under builderRoutes, but the generic authorization middleware skips authorization for all paths matching /api/webhooks/schema. As a result, an unauthenticated caller can update the body schema for a known webhook and mutate the corresponding automation trigger output schema. This vulnerability is fixed in 3.39.0.","state":0,"publishedAt":"2026-05-27T18:16:27.593+00:00","modifiedAt":"2026-06-17T10:54:53.923+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-qhv3-wjg8-6fx6"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48151","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-862"],"productCriteria":[],"sourceDates":{"published":"2026-05-27T18:16:27.593","lastModified":"2026-06-17T10:54:53.923"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-48151","identifiers":["CVE-2026-48151"]},"retained":false,"historicalAffected":[]},{"revision":"3976eab945eb4ad1a587a27c2b2c7c2d","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-qhv3-wjg8-6fx6","aliases":["CVE-2026-48151"],"title":"Budibase: Webhook schema endpoint authorization bypass allows unauthenticated mutation of webhook and automation schema","description":"The webhook schema-building endpoint is registered under `builderRoutes`, but the generic authorization middleware skips authorization for all paths matching `/api/webhooks/schema`. As a result, an unauthenticated caller can update the body schema for a known webhook and mutate the corresponding automation trigger output schema.\n\n### Details\n\nThe route appears to be builder-only:\n\n- `packages/server/src/api/routes/webhook.ts:5-9`\n\n```ts\n5:builderRoutes\n6:  .get(\"/api/webhooks\", controller.fetch)\n7:  .put(\"/api/webhooks\", webhookValidator(), controller.save)\n8:  .delete(\"/api/webhooks/:id/:rev\", controller.destroy)\n9:  .post(\"/api/webhooks/schema/:instance/:id\", controller.buildSchema)\n```\n\nHowever, webhook endpoint detection explicitly includes `schema`:\n\n- `packages/server/src/middleware/utils.ts:3-9`\n\n```ts\n3:const WEBHOOK_ENDPOINTS = new RegExp(\n4:  \"^/api/webhooks/(trigger|schema|discord|ms-teams|slack)(/|$)\"\n5:)\n6:\n7:export function isWebhookEndpoint(ctx: UserCtx): boolean {\n8:  const path = ctx.path || ctx.request.url.split(\"?\")[0]\n9:  return WEBHOOK_ENDPOINTS.test(path)\n```\n\nThe authorization middleware bypasses all webhook endpoints before checking `ctx.user` or permissions:\n\n- `packages/server/src/middleware/authorized.ts:90-99`\n\n```ts\n90:  ) =>\n91:  async (ctx: UserCtx, next: any) => {\n92:    // webhooks don't need authentication, each webhook unique\n93:    // also internal requests (between services) don't need authorized\n94:    if (isWebhookEndpoint(ctx) || ctx.internal) {\n95:      return next()\n96:    }\n97:\n98:    if (!ctx.user) {\n99:      return ctx.throw(401, \"No user info found\")\n```\n\nThe bypassed controller writes attacker-derived schema data to the webhook and automation trigger outputs:\n\n- `packages/server/src/api/controllers/webhook.ts:56-83`\n\n```ts\n56:export async function buildSchema(\n57:  ctx: Ctx<BuildWebhookSchemaRequest, BuildWebhookSchemaResponse>\n58:) {\n59:  await context.doInWorkspaceContext(ctx.params.instance, async () => {\n60:    const db = context.getWorkspaceDB()\n61:    const webhook = await db.get<Webhook>(ctx.params.id)\n62:    webhook.bodySchema = toJsonSchema(ctx.request.body)\n63:    // update the automation outputs\n64:    if (webhook.action.type === WebhookActionType.AUTOMATION) {\n65:      let automation = await db.get<Automation>(webhook.action.target)\n66:      const autoOutputs = automation.definition.trigger.schema.outputs\n67:      let properties = webhook.bodySchema?.properties\n68:      // reset webhook outputs\n69:      autoOutputs.properties = {\n70:        body: autoOutputs.properties.body,\n71:      }\n72:      for (let prop of Object.keys(properties || {})) {\n73:        if (properties?.[prop] == null) {\n74:          continue\n75:        }\n76:        const def = properties[prop]\n77:        if (typeof def === \"boolean\") {\n78:          continue\n79:        }\n80:        autoOutputs.properties[prop] = {\n81:          type: def.type as AutomationIOType,\n82:          description: AUTOMATION_DESCRIPTION,\n83:        }\n```\n\nThe route grouping suggests builder authorization was intended, but the global webhook bypass removes it.\n\n### PoC\n\nNon-destructive validation approach:\n\n1. Create a webhook-backed automation as a builder.\n2. Record the workspace ID and webhook ID.\n3. Log out or send no auth headers.\n4. Send:\n\n```http\nPOST /api/webhooks/schema/<workspaceId>/<webhookId> HTTP/1.1\ncontent-type: application/json\n\n{\"unauth_schema_probe\":\"test\"}\n```\n\n5. Fetch the webhook as a builder and observe that `bodySchema` has changed.\n6. For automation-backed webhooks, inspect the automation trigger schema outputs and observe that properties were reset/updated.\n\n### Impact\n\nAn unauthenticated attacker can modify webhook schema metadata and automation trigger output schema for known webhook IDs. This can corrupt builder-visible automation definitions, alter downstream binding behavior, and disrupt webhook-backed automation workflows.","state":0,"publishedAt":"2026-06-12T18:28:34+00:00","modifiedAt":"2026-09-10T03:50:50.2420752+00:00","affected":[{"ecosystem":"npm","name":"@budibase/server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.39.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/Budibase/budibase/security/advisories/GHSA-qhv3-wjg8-6fx6","https://nvd.nist.gov/vuln/detail/CVE-2026-48151","https://github.com/Budibase/budibase"],"sourceUrl":"https://github.com/advisories/GHSA-qhv3-wjg8-6fx6","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-qhv3-wjg8-6fx6","identifiers":["GHSA-qhv3-wjg8-6fx6","CVE-2026-48151"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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