Steeltoe.Management.Endpoint: HttpExchanges URI masking leaks query-string secrets (CVE-2026-75523) | HOL Guard CVE

Medium · CVSS 5.9CVE-2026-75523GHSA-8PHW-XRJ9-CPQP

Steeltoe.Management.Endpoint: HttpExchanges URI masking leaks query-string secrets

Answer in brief

CVE-2026-75523 records a Medium severity (CVSS 5.9) vulnerability in Steeltoe.Management.Endpoint: HttpExchanges URI masking leaks query-string secrets. The current sources do not mark it as known exploited. The current feed maps SteeltoeOSS/security-advisories (generic), Steeltoe.Management.Endpoint (nuget). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.9
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SteeltoeOSS/security-advisories (generic), Steeltoe.Management.Endpoint (nuget). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
SteeltoeOSS/security-advisoriesgeneric	< 4.3.0	Not reported
Steeltoe.Management.Endpointnuget	<=4.2.0	4.3.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for SteeltoeOSS/security-advisories, Steeltoe.Management.Endpoint.
Review the reported fix. Update Steeltoe.Management.Endpoint to 4.3.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.