Information Disclosure in OpenProject (CVE-2026-44736)
Summary
Vulnerability in OpenProject (CVE-2026-44736). Confidential information can be exposed externally. Exploitable via GET /api/v3/relations. Mitigation: upgrade to 17.4.0 or later.
Original description
The description as published by the source.
OpenProject is open-source, web-based project management software. Prior to 17.4.0, the GET /api/v3/relations endpoint allows any authenticated user to retrieve relations — and the subject (title) of work packages they have no permission to view — by supplying an arbitrary work package ID in the involved, fromId, or toId filter. This bypasses the Relation.visible scope due to a flawed performance optimization in RelationQuery. This vulnerability is fixed in 17.4.0.
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-2026-44736 has been found in OpenProject.
Attackers can target a specific entry point like GET /api/v3/relations over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 6.5/10.
What to do: upgrade OpenProject to 17.4.0 or later.
If unsure, ask your IT team or search "OpenProject CVE-2026-44736" on the vendor's site.
CVE-2026-44736 (OpenProject) — CWE-200 / CVSS v3 6.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: GET /api/v3/relations
Patched: 17.4.0 — 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.
Information disclosure (CWE-200) exists in OpenProject. Attackers reach the vulnerable code path via GET /api/v3/relations.
Check the vendor advisory for the affected versions of OpenProject. Attack surface: GET /api/v3/relations.
Severity: Medium (CVSS 6.5/10). Confidential information can be exposed externally.
Update to 17.4.0.
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/v3/relations requests with malformed payloads or SQL meta-characters. Run grep -r 'OpenProject' . 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 'OpenProject' . | 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
OpenProject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/v3/relations' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
GET /api/v3/relations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 OpenProject to 17.4.0ステージング環境で 17.4.0 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/v3/relations 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。
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov