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CVE-2026-40991
medium
CVSS 5.9
XXE (XML External Entity) in org.springframework.restdocs:spring-restdocs-webtestclient (CVE-2026-40991)
Summary
vulnerability in org.springframework.restdocs:spring-restdocs-webtestclient (CVE-2026-40991). Confidential information can be exposed externally.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-40991** has been found in org.springframework.restdocs:spring-restdocs-webtestclient.
Confidential information can be exposed externally. CVSS score: 5.9/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "org.springframework.restdocs:spring-restdocs-webtestclient CVE-2026-40991" on the vendor's site.
CVE-2026-40991 (org.springframework.restdocs:spring-restdocs-webtestclient) — CWE-611 / CVSS v3 5.9
Attack vector: remote (network-reachable) / unauthenticated
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.
❓ What is the problem
**A vulnerability** (CWE-611) exists in org.springframework.restdocs:spring-restdocs-webtestclient.
📍 Affected scope
org.springframework.restdocs:spring-restdocs-webtestclient — .
🔥 Severity
Severity: Medium (CVSS 5.9/10). Confidential information can be exposed externally
🔧 How to fix
Update to the patched release per vendor advisory.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'org.springframework.restdocs:spring-restdocs-webtestclient' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'org.springframework.restdocs:spring-restdocs-webtestclient' . | 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 `org.springframework.restdocs:spring-restdocs-webtestclient` を grep し、稼働しているサービス・バージョンを把握する。
-
7Post-deployment verification verify
Confirm patched version is live in production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 3 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
maven
org.springframework.restdocs:spring-restdocs-webtestclient
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
maven
org.springframework.restdocs:spring-restdocs-restassured
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- web https://nvd.nist.gov/vuln/detail/CVE-2026-40991
- web https://spring.io/security/cve-2026-40991
- web https://github.com/advisories/GHSA-6rpq-6vv2-5222
- web https://github.com/spring-projects/spring-restdocs/releases/tag/v3.0.6
- web https://github.com/spring-projects/spring-restdocs/releases/tag/v4.0.1