Vulnerability in @budibase/backend-core (CVE-2026-48147)
Summary
Vulnerability in @budibase/backend-core (CVE-2026-48147). Data can be tampered with by attackers. Exploitable via POST /api/global/users/invite. Mitigation: upgrade to 3.35.4 or later.
Original description
The description as published by the source.
Budibase is an open-source low-code platform. Prior to 3.35.4, the buildMatcherRegex() / matches() functions in packages/backend-core/src/middleware/matchers.ts route patterns are compiled into unanchored regular expressions and tested against ctx.request.url, which includes the full query string. The CSRF middleware in the Budibase Worker uses this matching system to decide whether to skip CSRF token validation. An unauthenticated attacker can forge state-changing cross-origin requests against any Worker API endpoint by injecting a public route pattern into the query string, causing the CSRF middleware to skip token validation entirely. This allows actions such as sending admin invites, modifying global configuration, and managing users without a valid CSRF token. This vulnerability is fixed in 3.35.4.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-48147 has been found in @budibase/backend-core.
Attackers can target a specific entry point like POST /api/global/users/invite over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 6.5/10.
What to do: upgrade @budibase/backend-core to 3.35.4 or later.
If unsure, ask your IT team or search "@budibase/backend-core CVE-2026-48147" on the vendor's site.
CVE-2026-48147 (@budibase/backend-core) — CWE-185 / CVSS v3 6.5
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: POST /api/global/users/invite / ctx.request.url / buildMatcherRegex / true
Patched: 3.35.4 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-185) exists in @budibase/backend-core. Attackers reach the vulnerable code path via POST /api/global/users/invite without authentication.
Check the vendor advisory for the affected versions of @budibase/backend-core. Attack surface: POST /api/global/users/invite / ctx.request.url / buildMatcherRegex / true.
Severity: Medium (CVSS 6.5/10). Data can be tampered with by attackers.
Update to 3.35.4.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/global/users/invite requests with malformed payloads or SQL meta-characters. Run grep -r '@budibase/backend-core' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r '@budibase/backend-core' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
@budibase/backend-coreを grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/global/users/invite' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/global/users/inviteへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade @budibase/backend-core to 3.35.4ステージング環境で 3.35.4 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against POST /api/global/users/invite on staging to confirm patch closes the vectorパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 2 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- web github.com