CVE-2026-50196 json
Steeltoe.Discovery.Eureka: Unrecognized DataCenterInfo.Name poisons entire registry fetch
published 4mo ago modified 16d ago also GHSA-j8ph-6fxj-g533 , EUVD-2026-37806
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nuget Steeltoe.Discovery.Eureka 3.4.0, 4.2.0
Is CVE-2026-50196 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 4mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Steeltoe.Discovery.Eureka | >=4.0.0, <4.2.0 <3.4.0 |
4.2.0 3.4.0 |
Affected products
- SteeltoeOSS Steeltoe.Discovery.Eureka
Classification
References
-
github.com
/SteeltoeOSS/Steeltoe/commit/b8ed8557bb595863e4f340051d16b26ba40a75f4
web
-
github.com
/SteeltoeOSS/Steeltoe/commit/c34a7399e808d0d11dd977460e81df1f2722df28
web
-
github.com
/SteeltoeOSS/security-advisories/security/advisories/GHSA-j8ph-6fxj-g533
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-50196
advisory
-
github.com
/SteeltoeOSS/Steeltoe
package
Sources
- CVE List CVE-2026-50196
- GitHub Advisory GHSA-j8ph-6fxj-g533
- NVD CVE-2026-50196
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