Vulnerability · Published Sep 17, 2026 · Assigned by GitHub_M
CVE-2026-75523Steeltoe.Management.Endpoint: HttpExchanges URI masking leaks query-string secrets
Medium 5.9
In plain English
A medium-severity information exposure in security-advisories from SteeltoeOSS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. Prior to 4.3.0, the Steeltoe.Management.Endpoint /actuator/httpexchanges endpoint passes recorded request URIs through MaskedUri, which masks URI user information but does not inspect query strings. When Management:Endpoints:HttpExchanges:IncludeQueryString is enabled, the HttpExchangeRequest response can disclose OAuth tokens, password-reset tokens, signed-URL signatures, API keys, and other query-string secrets from prior traffic to a caller that can reach the explicitly exposed endpoint. The Steeltoe.Management.Endpoint.Actuators.HttpExchanges DEBUG logger also records these URIs, creating a second disclosure channel for users with log access. This issue is fixed in version 4.3.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | steeltoe.management.endpoint | 4.3.0 | GHSA-8phw-xrj9-cpqp |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SteeltoeOSS | security-advisories | < 4.3.0 |
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N