CVE-2026-40982 — AI Deep Analysis Summary

🚨 **Essence**: Spring Cloud Config suffers from a **Directory Traversal** flaw. 📂 Attackers use crafted URLs to bypass restrictions. 💥 **Consequences**: Unauthorized access to arbitrary text & binary files.…

🛡️ **Root Cause**: **CWE-22** (Improper Limitation of a Pathname to a Restricted Directory). 🐛 The server fails to sanitize input paths, allowing `../` sequences to escape the intended directory.

📦 **Affected Products**: Spring Cloud Config. 📉 **Versions**: 3.1.0-3.1.13, 4.1.0-4.1.9, 4.2.0-4.2.6, 4.3.0-4.3.2, 5.0.0-5.0.2. ⚠️ All listed older versions are vulnerable!

🕵️ **Attacker Capabilities**: Read arbitrary files. 📄 Includes sensitive configs, secrets, or binaries. 🔓 **Privileges**: No authentication required (PR:N). High impact on Confidentiality (C:H) and Integrity (I:H).

🔓 **Exploitation Threshold**: **LOW**. 🌐 Network accessible (AV:N). Low complexity (AC:L). No user interaction (UI:N) or privileges (PR:N) needed. Easy to exploit remotely!

🚫 **Public Exploit**: **None listed**. 📝 The `pocs` field is empty. While no public PoC is provided in this data, the CVSS score suggests it is easily exploitable by skilled attackers.

🔍 **Self-Check**: Scan for Spring Cloud Config servers. 🧪 Test endpoints with `../` payloads in URL paths. 📡 Look for unexpected file content in responses. Check version numbers against the affected list.

✅ **Official Fix**: **YES**. 🛠️ Upgrade to safe versions: 3.1.14+, 4.1.10+, 4.2.7+, 4.3.3+, or 5.0.3+. 📢 Patches are available for all major branches.

🚧 **No Patch Workaround**: If upgrading isn't possible, restrict network access to the config server. 🚫 Block external access to config endpoints. Use a WAF to filter `../` patterns. Limit file serving capabilities.

🔥 **Urgency**: **HIGH**. 🚨 CVSS 3.1 Vector indicates severe impact. No auth required. Immediate patching or mitigation is strongly recommended to prevent data leaks!