Vulnerability in Steeltoe.Discovery.Eureka (CVE-2026-50196)
Summary
Vulnerability in Steeltoe.Discovery.Eureka (CVE-2026-50196). Risk of unauthorized operations or information disclosure. Exploitable via DataCenterInfo.FromJson. Mitigation: upgrade to 3.4.0 or later.
Original description
The description as published by the source.
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. In Steeltoe.Discovery.Eureka prior to versions 4.2.0 and 3.4.0, DataCenterInfo.FromJson throws ArgumentException for any name value other than "MyOwn" or "Amazon", despite the Java Eureka specification defining a third valid value: "Netflix". The exception propagates through the entire registry deserialization chain and is swallowed by the periodic cache refresh task, leaving the local service registry permanently empty or stale. Versions 4.2.0 and 3.4.0 patch the issue. If an immediate upgrade is not possible, remove any registrations using unsupported DataCenterInfo.name values from the registry. In mixed Java/Spring and Steeltoe environments, audit for the Netflix data center type before deploying Steeltoe Eureka clients.
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-2026-50196 has been found in Steeltoe.Discovery.Eureka.
Attackers can target a specific entry point like DataCenterInfo.FromJson over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade Steeltoe.Discovery.Eureka to 3.4.0 or later.
If unsure, ask your IT team or search "Steeltoe.Discovery.Eureka CVE-2026-50196" on the vendor's site.
CVE-2026-50196 (Steeltoe.Discovery.Eureka) — CWE-20 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: DataCenterInfo.FromJson / ArgumentException / name / DataCenterInfo.name
Patched: 3.4.0 — 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.
A vulnerability (CWE-20) exists in Steeltoe.Discovery.Eureka. Attackers reach the vulnerable code path via DataCenterInfo.FromJson without authentication.
Check the vendor advisory for the affected versions of Steeltoe.Discovery.Eureka. Attack surface: DataCenterInfo.FromJson / ArgumentException / name / DataCenterInfo.name.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 3.4.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'Steeltoe.Discovery.Eureka' . 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
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1Identify exposure identify
grep -r 'Steeltoe.Discovery.Eureka' . | 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
Steeltoe.Discovery.Eurekaを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade Steeltoe.Discovery.Eureka to 3.4.0ステージング環境で 3.4.0 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を含めること。
-
3Post-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
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- patch github.com
- web github.com