Authorization Flaw in flowise (CVE-2026-70474)
Summary
Vulnerability in flowise (CVE-2026-70474). Confidential information can be exposed externally. Exploitable via POST /api/v1/oauth2-credential/authorize/. Mitigation: upgrade to 3.1.3 or later.
Original description
The description as published by the source.
Summary
Three OAuth2 credential endpoints look up credentials by id alone with no workspaceId filter. Two of these endpoints (callback, refresh) are whitelisted from all authentication. This allows:
- Cross-workspace credential access — Any authenticated user can initiate OAuth2 flows against credentials belonging to other workspaces.
- Unauthenticated token injection — An unauthenticated attacker can forge OAuth2 callbacks to overwrite tokens in any credential.
- Unauthenticated token refresh — An unauthenticated attacker can refresh tokens for any credential.
Root Cause
Vulnerable code: no workspace scoping
All three OAuth2 handlers query the Credential table by id only:
packages/server/src/routes/oauth2/index.ts:80-82 (authorize)
const credential = await credentialRepository.findOneBy({
id: credentialId
// Missing: workspaceId filter
})
packages/server/src/routes/oauth2/index.ts:183-185 (callback)
const credential = await credentialRepository.findOneBy({
id: state as string
// Missing: workspaceId filter
})
packages/server/src/routes/oauth2/index.ts:314-316 (refresh)
const credential = await credentialRepository.findOneBy({
id: credentialId
// Missing: workspaceId filter
})
Correct pattern (same codebase)
The standard credential service correctly enforces workspace isolation:
**`packages/server/src/services/credentials/ind…
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-2026-70474 has been found in flowise.
Attackers can target a specific entry point like POST /api/v1/oauth2-credential/authorize/ over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade flowise to 3.1.3 or later.
If unsure, ask your IT team or search "flowise CVE-2026-70474" on the vendor's site.
CVE-2026-70474 (flowise) — CWE-863 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/v1/oauth2-credential/authorize/ / GET /api/v1/oauth2-credential/callback / POST /api/v1/oauth2-credential/refresh/ / workspaceId
Patched: 3.1.3 — 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.
Incorrect authorization (CWE-863) exists in flowise. Attackers reach the vulnerable code path via POST /api/v1/oauth2-credential/authorize/.
Check the vendor advisory for the affected versions of flowise. Attack surface: POST /api/v1/oauth2-credential/authorize/ / GET /api/v1/oauth2-credential/callback / POST /api/v1/oauth2-credential/refresh/ / workspaceId.
Severity: High (CVSS 8.1/10). Confidential information can be exposed externally.
Update to 3.1.3.
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/v1/oauth2-credential/authorize/ requests with malformed payloads or SQL meta-characters. Run grep -r 'flowise' . 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 'flowise' . | 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
flowise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/v1/oauth2-credential/authorize/' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/oauth2-credential/authorize/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 flowise to 3.1.3ステージング環境で 3.1.3 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/v1/oauth2-credential/authorize/ 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
- package github.com
- web github.com
- web github.com
- web github.com