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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.9 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-75523: 0.44% estimated exploitation activity in the next 30 days; percentile 38.09 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary Steeltoe's /actuator/httpexchanges endpoint records and displays request URIs after passing them through MaskedUri. The masking only covers the UserInfo portion of the URI (inline user:password@host credentials) and does not inspect the query string. With IncludeQueryString enabled by default, any secrets carried in query strings (for example: OAuth tokens, password-reset tokens, signed-URL signatures, API keys) are returned verbatim in the uri field of the response and written to logs at DEBUG level. Impact Any caller who can reach /actuator/httpexchanges can receive full request URIs from prior traffic, including any secrets those URIs contained in their query strings. Applications with DEBUG-level logging enabled for the Steeltoe.Management.Endpoint.Actuators.HttpExchanges namespace also write these URIs to their application logs. Affected configuration - httpexchanges is explicitly added to the actuator exposure list (Management:Endpoints:Web:Exposure:Include). It is not…

Published by the source

17 Sep 2026, 18:01 UTC

Last modified by the source

17 Sep 2026, 18:15 UTC

Source last checked

26 Oct 2026, 17:05 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-8phw-xrj9-cpqp

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-8phw-xrj9-cpqp

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# Patch Next advisory brief: CVE-2026-75523

Advisory: Steeltoe.Management.Endpoint: HttpExchanges URI masking leaks query-string secrets
IDs: CVE-2026-75523, GHSA-8phw-xrj9-cpqp
Record: https://patchnext.com/advisories/cve-2026-75523 (revision 2, source checked 26 Oct 2026, 17:05 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: steeltoe.management.endpoint 4.3.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet steeltoe.management.endpoint: affected <= 4.2.0; fixed in 4.3.0

## Suggested inspection (read-only)
- NuGet steeltoe.management.endpoint: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on steeltoe.management.endpoint.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8phw-xrj9-cpqp (OSV record GHSA-8phw-xrj9-cpqp lists affected ranges: NuGet steeltoe.management.endpoint >=0 <4.3.0 (fixed))
- Verified: https://github.com/advisories/GHSA-8phw-xrj9-cpqp (GitHub-reviewed advisory GHSA-8phw-xrj9-cpqp lists affected ranges: NuGet steeltoe.management.endpoint >=0 <=4.2.0)

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