CVE-2026-34397 | himmelblau-idm himmelblau up to 2.3.8/3.1.0 NSS Module privileges management (GHSA-v7xx-7mqc-g835)

VDB-354737 · CVE-2026-34397 · GHSA-V7XX-7MQC-G835 HIMMELBLAU-IDM HIMMELBLAU UP TO 2.3.8/3.1.0 NSS MODULE PRIVILEGES MANAGEMENT HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.3 $0-$5k 1.10+ Summaryinfo A vulnerability was found in himmelblau-idm himmelblau up to 2.3.8/3.1.0. It has been classified as critical. This impacts an unknown function of the component NSS Module. The manipulation leads to privileges management. This vulnerability is uniquely identified as CVE-2026-34397. Local access is required to approach this attack. No exploit exists. Upgrading the affected component is recommended. Detailsinfo A vulnerability, which was classified as critical, has been found in himmelblau-idm himmelblau up to 2.3.8/3.1.0. This issue affects an unknown code block of the component NSS Module. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is: 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. The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-34397 since 03/27/2026. The exploitation is known to be difficult. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue. Upgrading to version 2.3.9 or 3.1.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Productinfo Vendor himmelblau-idm Name himmelblau Version 2.3.0 2.3.1 2.3.2 2.3.3 2.3.4 2.3.5 2.3.6 2.3.7 2.3.8 3.0 3.1.0 Website Product: https://github.com/himmelblau-idm/himmelblau/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 5.4 VulDB Meta Temp Score: 5.3 VulDB Base Score: 4.5 VulDB Temp Score: 4.3 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 6.3 CNA Vector (GitHub_M): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Privileges management CWE: CWE-269 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: himmelblau 2.3.9/3.1.1 Timelineinfo 03/27/2026 CVE reserved 04/01/2026 +4 days Advisory disclosed 04/01/2026 +0 days VulDB entry created 04/01/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: GHSA-v7xx-7mqc-g835 Status: Confirmed CVE: CVE-2026-34397 (🔒) GCVE (CVE): GCVE-0-2026-34397 GCVE (VulDB): GCVE-100-354737 Entryinfo Created: 04/01/2026 20:46 Changes: 04/01/2026 20:46 (66) Complete: 🔍 Cache ID: 99:4D3:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸