Vulnerability in @budibase/server (CVE-2026-50132)
Summary
Vulnerability in @budibase/server (CVE-2026-50132). Confidential information can be exposed externally. Exploitable via GET /api/chat-links/. Mitigation: upgrade to 3.39.0 or later.
Original description
The description as published by the source.
Budibase is an open-source low-code platform. Prior to 3.39.0, GET /api/chat-links/:instance/:token/handoff is a public endpoint (no auth required) that performs a permanent, state-changing operation: it binds an external chat identity (Slack/Discord/MS Teams) to an authenticated Budibase user account, with no consent UI and no CSRF protection. The session token in the URL is created by the attacker (from their own /link slash command) and embeds the attacker's externalUserId. When an authenticated Budibase victim visits the URL, their account is silently and permanently linked to the attacker's Slack/Discord identity. The server responds with "Authentication succeeded." — no indication of what was linked. This vulnerability is fixed in 3.39.0.
Source: GitHub Security Advisories (Global) 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-2026-50132 has been found in @budibase/server.
Attackers can target a specific entry point like GET /api/chat-links/ over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.3/10.
What to do: upgrade @budibase/server to 3.39.0 or later.
If unsure, ask your IT team or search "@budibase/server CVE-2026-50132" on the vendor's site.
CVE-2026-50132 (@budibase/server) — CWE-284 / CVSS v3 7.3
Attack vector: remote (network-reachable)
Attack surface: GET /api/chat-links/ / GET /api/chat-links/ws_abc123/tok_xxxxxxxxxxxxxxxx/handoff / GET /api/chat-links/ / POST /api/chat-links/
Patched: 3.39.0 — 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-284) exists in @budibase/server. Attackers reach the vulnerable code path via GET /api/chat-links/.
Check the vendor advisory for the affected versions of @budibase/server. Attack surface: GET /api/chat-links/ / GET /api/chat-links/ws_abc123/tok_xxxxxxxxxxxxxxxx/handoff / GET /api/chat-links/ / POST /api/chat-links/.
Severity: High (CVSS 7.3/10). Confidential information can be exposed externally.
Update to 3.39.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual GET /api/chat-links/ requests with malformed payloads or SQL meta-characters. Run grep -r '@budibase/server' . 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/server' . | 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/server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 'GET /api/chat-links/' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
GET /api/chat-links/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/server to 3.39.0ステージング環境で 3.39.0 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 GET /api/chat-links/ 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
- web github.com
- web github.com