Critical severity9.9NVD Advisory· Published Apr 2, 2026· Updated Apr 15, 2026
CVE-2026-34838
CVE-2026-34838
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.
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Affected products
2cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*range: <6.8.156
- (no CPE)range: <6.8.156 || <25.0.90 || <26.0.12
Patches
Vulnerability mechanics
References
4- github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxqnvdVendor Advisory
- github.com/Intermesh/groupoffice/releases/tag/v25.0.90nvdRelease Notes
- github.com/Intermesh/groupoffice/releases/tag/v26.0.12nvdRelease Notes
- github.com/Intermesh/groupoffice/releases/tag/v6.8.156nvdRelease Notes
News mentions
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