CVE-2026-81516

Steeltoe.Discovery.Consul: malformed 'secure' metadata aborts service instance lookup (DoS)

Published Sep 17, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. From 4.0.0 until 4.3.0, ConsulDiscoveryClient constructs ConsulServiceInstance objects by parsing each registration's secure metadata with a strict Boolean conversion. A principal that can register a Consul service can supply a secure value other than true or false, causing the exception from one instance to abort construction of the entire instance list and make the targeted service undiscoverable. When GetAllInstancesAsync enumerates all services, one malformed instance can abort enumeration across every service. The outage persists until the offending registration is removed. This issue is fixed in version 4.3.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-67c9-f6v2-qv86 Steeltoe.Discovery.Consul: malformed 'secure' metadata aborts service instance lookup (DoS)
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Steeltoeoss
Steeltoeoss security-advisories
Vendors & Products Steeltoeoss
Steeltoeoss security-advisories
Type Values Removed Values Added
Description Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. From 4.0.0 until 4.3.0, ConsulDiscoveryClient constructs ConsulServiceInstance objects by parsing each registration's secure metadata with a strict Boolean conversion. A principal that can register a Consul service can supply a secure value other than true or false, causing the exception from one instance to abort construction of the entire instance list and make the targeted service undiscoverable. When GetAllInstancesAsync enumerates all services, one malformed instance can abort enumeration across every service. The outage persists until the offending registration is removed. This issue is fixed in version 4.3.0.
Title Steeltoe.Discovery.Consul: malformed 'secure' metadata aborts service instance lookup (DoS)
Weaknesses CWE-755
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 17, 2026, 7:19 PM
Reserved
Aug 26, 2026, 8:58 PM
Status
Awaiting Analysis
Published
Sep 17, 2026, 4:17 PM
Modified
Sep 30, 2026, 5:31 PM