SSRF (Server-Side Request Forgery) in unleash-server (CVE-2026-63004)
Summary
SSRF in unleash-server (CVE-2026-63004). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/admin/addons. Mitigation: upgrade to 8.0.2 or later.
Original description
The description as published by the source.
Unleash is an open-source feature management platform. Prior to 7.5.2, 7.6.5, and 8.0.2, the addon and integration subsystem passes the operator-controlled parameters.url value from src/lib/addons/webhook.ts and the Slack, Microsoft Teams, Datadog, and New Relic integrations to Addon.fetchRetry in src/lib/addons/addon.ts without restricting loopback, link-local, private, or cloud metadata addresses. An authenticated actor with the root CREATE_ADDON or UPDATE_ADDON permission can cause the server to send requests from inside its network boundary, use integration event status as a blind probing oracle, forward Authorization, customHeaders, or DD-API-KEY values to an attacker-observed host, and deliver the feature-event JSON body to internal services. This issue is fixed in versions 7.5.2, 7.6.5, and 8.0.2.
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-2026-63004 has been found in unleash-server.
Attackers can target a specific entry point like POST /api/admin/addons over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: upgrade unleash-server to 8.0.2 or later.
If unsure, ask your IT team or search "unleash-server CVE-2026-63004" on the vendor's site.
CVE-2026-63004 (unleash-server) — CWE-918 / CVSS v3 5.5
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/admin/addons / url / parameters.url / Authorization
Patched: 8.0.2 — 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.
SSRF (CWE-918) exists in unleash-server. Attackers reach the vulnerable code path via POST /api/admin/addons.
Check the vendor advisory for the affected versions of unleash-server. Attack surface: POST /api/admin/addons / url / parameters.url / Authorization.
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.
Update to 8.0.2.
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/admin/addons requests with malformed payloads or SQL meta-characters. Run grep -r 'unleash-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 'unleash-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
unleash-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 'POST /api/admin/addons' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/admin/addons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 unleash-server to 8.0.2ステージング環境で 8.0.2 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/admin/addons 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 github.com
- advisory nvd.nist.gov
- package github.com
- patch github.com
- patch github.com
- patch github.com
- web github.com
- web github.com
- web github.com
- web github.com