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CVE-2026-40981 high CVSS 7.5

Vulnerability in org.springframework.cloud:spring-cloud-config (CVE-2026-40981)

Summary

Vulnerability in org.springframework.cloud:spring-cloud-config (CVE-2026-40981). Confidential information can be exposed externally. Mitigation: upgrade to 5.0.3 or later.

Original description

The description as published by the source.

When using Google Secrets Manager as a backend for the Spring Cloud Config server a client can craft a request to the config server potentially exposing secrets from unintended GCP projects.
Spring Cloud Config 3.1.x: affected from 3.1.0 through 3.1.13 (inclusive); upgrade to 3.1.14 or greater (Enterprise Support Only). Spring Cloud Config 4.1.x: affected from 4.1.0 through 4.1.9 (inclusive); upgrade to 4.1.10 or greater (Enterprise Support Only). Spring Cloud Config 4.2.x: affected from 4.2.0 through 4.2.6 (inclusive); upgrade to 4.2.7 or greater (Enterprise Support Only). Spring Cloud Config 4.3.x: affected from 4.3.0 through 4.3.2 (inclusive); upgrade to 4.3.3 or greater. Spring Cloud Config 5.0.x: affected from 5.0.0 through 5.0.2 (inclusive); upgrade to 5.0.3 or greater.

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-2026-40981 has been found in org.springframework.cloud:spring-cloud-config.
Confidential information can be exposed externally. CVSS score: 7.5/10.
What to do: upgrade org.springframework.cloud:spring-cloud-config to 5.0.3 or later.
If unsure, ask your IT team or search "org.springframework.cloud:spring-cloud-config CVE-2026-40981" on the vendor's site.

CVE-2026-40981 (org.springframework.cloud:spring-cloud-config) — CWE-639 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 5.0.3 — 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.

❓ What is the problem

A vulnerability (CWE-639) exists in org.springframework.cloud:spring-cloud-config.

📍 Affected scope

Check the vendor advisory for the affected versions of org.springframework.cloud:spring-cloud-config.

🔥 Severity

Severity: High (CVSS 7.5/10). Confidential information can be exposed externally.

🔧 How to fix

Update to 5.0.3.

🛡️ 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. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで org.springframework.cloud:spring-cloud-config を使っているサービスとバージョンを洗い出す。

  2. 2
    Apply patch patch 
    Upgrade org.springframework.cloud:spring-cloud-config to 5.0.3

    ステージング環境で 5.0.3 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を含めること。

  3. 3
    Post-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。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

maven org.springframework.cloud:spring-cloud-config
[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.0.3"}]}]
maven org.springframework.cloud:spring-cloud-config-server
[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0"},{"fixed":"5.0.3"}]}]

References

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