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VulnerabilityPublished

CVE-2026-50196: SteeltoeOSS Steeltoe.Discovery.Eureka · Improper Input Validation

Affects SteeltoeOSS Steeltoe.Discovery.EurekaSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 4.2.0 or 3.4.0 soon.

Data as of 30 Oct 2026, 20:25 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 4.2.0, 3.4.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade Steeltoe.Discovery.Eureka and steeltoe.discovery.eureka to 4.2.0 or 3.4.0.

Affected software

ProductAffectedFixed in
SteeltoeOSSSteeltoe.Discovery.EurekaAffected
  • >=4.0.0 <4.2.0
Fixed in
  • 4.2.0
SteeltoeOSSSteeltoe.Discovery.EurekaAffected
  • <3.4.0
Fixed in
  • 3.4.0
NuGetsteeltoe.discovery.eurekapkg:nuget/steeltoe.discovery.eurekaOther threatsAffected
  • <3.4.0
  • <4.2.0
Fixed in
  • 3.4.0
  • 4.2.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in Steeltoe.Discovery.Eureka versions 3.4.0 and 4.2.0. Users should upgrade to these versions to resolve the issue. If immediate upgrading is not feasible, remove any registry entries using unsupported DataCenterInfo.name values such as 'Netflix' from the registry. Additionally, audit mixed Java/Spring and Steeltoe environments for the 'Netflix' data center type before deploying Steeltoe Eureka clients to prevent the issue.

Description

Steeltoe.Discovery.Eureka versions prior to 3.4.0 and 4.2.0 improperly handle the DataCenterInfo.FromJson method by throwing an exception for the valid 'Netflix' data center name, which is defined in the Java Eureka specification. This causes the local service registry to become permanently empty or stale due to swallowed exceptions during cache refresh. The issue is patched in versions 3.4.0 and 4.2.0. If upgrading immediately is not possible, removing unsupported DataCenterInfo.name values from the registry is recommended.

References

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