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.NET
.NET NuGet
Not in CISA KEV
LOW severity

Exposure of Sensitive Information in Elastic APM .NET AgentGHSA-hx93-gc73-5rpr

LOWFix: elastic/apm-agent-dotnet#1286

GHSA-hx93-gc73-5rpr is a low-severity (CVSS 2.1) Information Exposure vulnerability in Elastic.Apm. A fix is available for Elastic.Apm — see the affected versions and patch details below.

Also known asCVE-2021-22143
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for GHSA-hx93-gc73-5rpr.

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk+0.05%
Lower risk than most CVEs52th percentile — riskier than 52% of all scored CVEsHighest risk
0.11%0.46%0.81%1.16%0.6%0.7%Aug 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
.NETElastic.Apm

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

The Elastic APM .NET Agent can leak sensitive HTTP header information when logging the details during an application error. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application error it is possible the headers will not be sanitized before being sent.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetElastic.Apmall versions1.10.0dotnet add package Elastic.Apm --version 1.10.0

Affected Products

1 product · 1 configurations
Application
apm .net agentelastic
< 1.10.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Elastic.Apm, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update Elastic.Apm to 1.10.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-hx93-gc73-5rpr is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

The Elastic APM .NET Agent can leak sensitive HTTP header information when logging the details during an application error. Normally, the APM agent will sanitize sensitive HTTP header details before sending the information to the APM server. During an application error it is possible the headers will not be sanitized before being sent.
O3 Security · Impact-Aware SCA

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Exposure of Sensitive Information in Elastic APM .NET…