Is CVE-2026-34397 actively exploited?

No active exploitation of CVE-2026-34397 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34397 be exploited remotely?

No. CVE-2026-34397 requires local access to exploit.

What is the CVSS score of CVE-2026-34397?

CVE-2026-34397 has a CVSS score of 6.3 (MEDIUM).

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MEDIUM

CVE-2026-34397

CWE-269Published: April 1, 2026· Updated: Apr 3, 2026

6.3

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.2th

Official Description

Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From versions 2.0.0-alpha to before 2.3.9 and 3.0.0-alpha to before 3.1.1, there is a conditional local privilege escalation vulnerability in an edge-case naming collision. Only authenticated himmelblau users whose mapped CN/short name exactly matches a privileged local group name (e.g., "sudo", "wheel", "docker", "adm") can cause the NSS module to resolve that group name to their fake primary group. If the system uses NSS results for group-based authorization decisions (sudo, polkit, etc.), this can grant the attacker the privileges of that group. This issue has been patched in versions 2.3.9 and 3.1.1.

NVD Source

Technical Analysis

CVE-2026-34397 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 6.3.