Vulnerability in open-webui (CVE-2026-87013)
Summary
Vulnerability in open-webui (CVE-2026-87013). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/v1/folders/{id}/update/parent. Mitigation: upgrade to 0.11.1 or later.
Original description
The description as published by the source.
Summary
Any authenticated user can move one of their own folders under itself, leaving a loop in their folder tree. The re-parent endpoint performed no check that the new parent was not the folder itself or one of its own subfolders, and the folder tree walks did not track which folders they had already visited. A single request against a folder in a loop therefore never finishes.
Preconditions
Folders must be enabled (ENABLE_FOLDERS, default true) and the acting user's role must hold the folders feature permission (USER_PERMISSIONS_FEATURES_FOLDERS, default true). Both are on in a default install. Any authenticated account is sufficient: no administrator, no second user, no shared folder and no victim interaction. Deployments that disable folders, or withhold the folders feature permission from non-admin roles, are not affected.
Impact
A single request that never returns. It keeps running after the client disconnects, holds a CPU core and grows its in-memory folder list at roughly 0.6 GB per hour until the process is restarted. The folder stays in the looping state in the database, so any later request touching that folder starts the loop again.
The instance stays responsive while this happens. Each step of the walk waits on a database query, so other users continue to be served normally; measured on a default install, two concurrent instances of this request left unrelated users unaffected, and roughly 900 concurrent requests were needed before anyone else s…
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-2026-87013 has been found in open-webui.
Attackers can target a specific entry point like POST /api/v1/folders/{id}/update/parent over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 4.3/10.
What to do: upgrade open-webui to 0.11.1 or later.
If unsure, ask your IT team or search "open-webui CVE-2026-87013" on the vendor's site.
CVE-2026-87013 (open-webui) — CWE-835 / CVSS v3 4.3
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/v1/folders/{id}/update/parent / DELETE /api/v1/folders/{id} / POST /api/v1/folders/{id}/read / ENABLE_FOLDERS
Patched: 0.11.1 — 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-835) exists in open-webui. Attackers reach the vulnerable code path via POST /api/v1/folders/{id}/update/parent.
Check the vendor advisory for the affected versions of open-webui. Attack surface: POST /api/v1/folders/{id}/update/parent / DELETE /api/v1/folders/{id} / POST /api/v1/folders/{id}/read / ENABLE_FOLDERS.
Severity: Medium (CVSS 4.3/10). Risk of unauthorized operations or information disclosure.
Update to 0.11.1.
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/folders/{id}/update/parent requests with malformed payloads or SQL meta-characters. Run grep -r 'open-webui' . 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 'open-webui' . | 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
open-webui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/folders/{id}/update/parent' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/folders/{id}/update/parent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 open-webui to 0.11.1ステージング環境で 0.11.1 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/folders/{id}/update/parent 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 nvd.nist.gov
- advisory github.com
- package github.com
- package pypi.org
- web github.com
- web github.com
- web github.com
- web github.com