CVE-2022-26907Network attack vector

Authenticated request-header disclosure via unsanitized exception state

Published Apr 15, 2022 · Updated Jan 2, 2025

Information disclosure in Microsoft.Rest.ClientRuntime 2.0.0 through 2.3.23 allows remote authenticated users to read sensitive request headers. HttpRequestMessageWrapper copies every HTTP request header, including Authorization and custom secret-bearing headers, into exception state without sanitizing their values. Exploitation requires low-privileged network access and a request path that exposes the resulting exception details; disclosed data is limited to request-header values.

CVSS severity5.3
Medium
EPSS probability2.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Microsoft.Rest.ClientRuntime 2.0.0 through 2.3.23 allows remote authenticated users to read sensitive request headers. HttpRequestMessageWrapper copies every HTTP request header, including Authorization and custom secret-bearing headers, into exception state without sanitizing their values. Exploitation requires low-privileged network access and a request path that exposes the resulting exception details; disclosed data is limited to request-header values.

The record

CVE
CVE-2022-26907
Published
Apr 15, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Azure SDK for .NET
Classifications
CWE-532, T1552
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <2.3.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Microsoft · Azure SDK for .NETversion=2.0.0 <2.3.24

Published CVSS scores

4.0NIST NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.3Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-532Insertion of Sensitive Information into Log File
T1552Unsecured Credentials

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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