Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized attacker to execute code over a network.

The remote SUSE Linux SLES_SAP16 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:20621-1 advisory.

    - CVE-2026-21226: Fixed deserialization of untrusted data which may allow an authorized attacker to     execute code over a network. (bsc#1257703)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:20617-1 advisory.

    - CVE-2026-21226: Fixed deserialization of untrusted data which may allow an authorized attacker to     execute code over a network. (bsc#1257703)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has a package installed that is affected by a vulnerability as referenced in the openSUSE- SU-2026:20292-1 advisory.

    - CVE-2026-21226: Fixed deserialization of untrusted data which may allow an authorized attacker to     execute code over a network. (bsc#1257703)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2026-3beebfc8ff advisory.

    Update to 1.38.0 to address CVE-2026-21226


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2026-45e69bddb9 advisory.

    Update to 1.38.0 to address CVE-2026-21226


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:0476-1 advisory.

    - CVE-2026-21226: Fixed deserialization of untrusted data which may allow an authorized attacker to     execute code over a network. (bsc#1257703)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - Deserialization of untrusted data in Azure Core shared client library for Python allows an authorized
    attacker to execute code over a network. (CVE-2026-21226)

The Azure Core shared client library for Python installation on the remote host is missing a security update. It is, therefore, affected by an elevation of privilege vulnerability (CVE-2026-21226).

  - An attacker who successfully exploited this vulnerability could gain elevated privileges by manipulating     how the library handles credential caching or environment variable processing in certain configurations.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
320368	openSUSE 15: azure-cli / azure-cli-core / azure-cli-telemetry / python311-anyio / etc (SUSE-SU-SUSE-RU-2026:2237-2)	Nessus	SuSE Local Security Checks	medium
301290	SUSE SLES16 Security Update : python-azure-core (SUSE-SU-2026:20621-1)	Nessus	SuSE Local Security Checks	high
301283	SUSE SLES16 Security Update : python-azure-core (SUSE-SU-2026:20617-1)	Nessus	SuSE Local Security Checks	high
300835	openSUSE 16 Security Update : python-azure-core (openSUSE-SU-2026:20292-1)	Nessus	SuSE Local Security Checks	high
299625	Fedora 42 : azure-cli / python-azure-core (2026-3beebfc8ff)	Nessus	Fedora Local Security Checks	high
299623	Fedora 43 : azure-cli / python-azure-core (2026-45e69bddb9)	Nessus	Fedora Local Security Checks	high
298922	SUSE SLES15 / openSUSE 15 Security Update : python-azure-core (SUSE-SU-2026:0476-1)	Nessus	SuSE Local Security Checks	high
436740	SCA: security update for azure-core (GHSA-jm66-cg57-jjv5)	Tenable Cloud Security	SCA Checks	high
436740	SCA: security update for azure-core (GHSA-jm66-cg57-jjv5)	Tenable Self-Hosted Container Security	SCA Checks	high
283875	Security Update for Azure Core shared client library for Python < 1.38.0 (January 2026)	Nessus	Misc.	high

Detections

Analytics

CVE-2026-21226

high

Tenable Plugins

medium

high

high

high

high

high

high

high

high

high