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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-34838 Detail

Description

Group-Office is an enterprise customer relationship management and groupware tool. Prior to versions 6.8.156, 25.0.90, and 26.0.12, a vulnerability in the AbstractSettingsCollection model leads to insecure deserialization when these settings are loaded. By injecting a serialized FileCookieJar object into a setting string, an authenticated attacker can achieve Arbitrary File Write, leading directly to Remote Code Execution (RCE) on the server. This issue has been patched in versions 6.8.156, 25.0.90, and 26.0.12.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/Intermesh/groupoffice/releases/tag/v25.0.90 GitHub, Inc. Release Notes 
https://github.com/Intermesh/groupoffice/releases/tag/v26.0.12 GitHub, Inc. Release Notes 
https://github.com/Intermesh/groupoffice/releases/tag/v6.8.156 GitHub, Inc. Release Notes 
https://github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxq GitHub, Inc. Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-502 Deserialization of Untrusted Data GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-34838
NVD Published Date:
04/02/2026
NVD Last Modified:
07/24/2026
Source:
GitHub, Inc.