{"id":"CVE-2026-34838","summary":"Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection`","details":"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.","aliases":["GHSA-h22j-frrf-5vxq"],"modified":"2026-08-07T11:50:58.745091692Z","published":"2026-04-02T19:15:40.591Z","database_specific":{"cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34838.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/Intermesh/groupoffice/releases/tag/v25.0.90"},{"type":"WEB","url":"https://github.com/Intermesh/groupoffice/releases/tag/v26.0.12"},{"type":"WEB","url":"https://github.com/Intermesh/groupoffice/releases/tag/v6.8.156"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34838.json"},{"type":"ADVISORY","url":"https://github.com/Intermesh/groupoffice/security/advisories/GHSA-h22j-frrf-5vxq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34838"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/intermesh/groupoffice","events":[{"introduced":"0"},{"fixed":"e8da138f484fe259387bb613d83bff27fb2f5b49"},{"introduced":"86a5e33c9c9adfc29537c29d42fb0029f456837b"},{"fixed":"ca8bf2a3c577c53b07ff5d704e9dff5742ebd264"},{"introduced":"3c64605e5d45b524915be331b2de97cd04858cb6"},{"fixed":"90b206f87cee76439d3792abe84d21de922f6a29"}],"database_specific":{"cpe":"cpe:2.3:a:intermesh:group-office:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"6.8.156"},{"introduced":"25.0.1"},{"fixed":"25.0.90"},{"introduced":"26.0.1"},{"fixed":"26.0.12"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v6.8.155","v25.0.89","v6.8.154","v25.0.87","v26.0.9","v6.8.153","v25.0.86","v6.8.152","v25.0.85","v26.0.7","v25.0.84","v6.8.151","v26.0.6","v25.0.83","v6.8.150","v26.0.5","v25.0.82","v26.0.4","v25.0.81","v25.0.80","v25.0.79","v25.0.78","v6.8.147","v25.0.76","v25.0.75","v25.0.74","v6.8.146","v25.0.72","v25.0.71","v25.0.70","v25.0.69","v25.0.68","v25.0.67","v6.8.142","v25.0.66","v6.8.141","v25.0.64","v25.0.62","v25.0.61","v25.0.59","v6.8.139","v25.0.58","v25.0.56","v25.0.55","v25.0.53","v25.0.52","v25.0.51","v25.0.50","v25.0.49","v25.0.48","v25.0.47","v6.8.135","v25.0.46","v6.8.134","v6.8.133","v25.0.40","v6.8.132","v25.0.39","v25.0.38","v6.8.131","v25.0.37","v25.0.36","v25.0.35","v6.8.130","v25.0.34","v6.8.129","v25.0.32","v6.8.128","v6.8.127","v25.0.30","v6.8.126","v6.8.125","v25.0.29","v6.8.124","v6.8.123","v25.0.28","v25.0.27","v6.8.122","v25.0.25","v6.8.121","v25.0.23","v6.8.120","v25.0.22","v25.0.21","v25.0.20","v6.8.118","v6.8.117","v6.8.116","v25.0.16","v25.0.15","v6.8.114","v25.0.14","v25.0.12","v25.0.11","v25.0.10","v25.0.9","v6.8.109","v6.8.106","v6.8.107","v6.8.105","v6.8.104","v6.8.102","v6.8.101","v6.8.100","v6.8.98","v6.8.97","v6.8.96","v6.8.95","v6.8.94","v6.8.93","v6.8.90","v6.8.88","v6.8.87","v6.8.85","v6.8.84","v6.8.83","v6.8.79","v6.8.77","v6.8.76","v6.8.73","v6.8.70","v6.8.69","v6.8.66","v6.8.64","v6.8.63","v6.8.62","v6.8.61","v6.8.60","v6.8.59","v6.8.58","v6.8.57","v6.8.56","v6.8.54","v6.8.50","v6.8.49","v6.8.47","v6.8.45","v6.8.44","v6.8.43","v6.8.42","v6.8.41","v6.8.40","v6.8.39","v6.8.38","v6.8.37","v6.8.35","v6.8.34","v6.8.33","v6.8.32","v6.8.31","v6.8.30","v6.8.29","v6.8.28","v6.8.26","v6.8.25","v6.8.24","v6.8.23","v6.8.21","v6.8.19","v6.8.18","v6.8.17","v6.8.16","v6.8.15","v6.8.14","v6.8.12","v6.8.11","v6.8.10","v6.8.9","v6.8.7","v6.8.6","v6.7.44","v6.7.43","v6.7.42","v6.7.41","v6.7.40","v6.7.39","v6.7.38","v6.7.37","v6.7.36","v6.7.35","v6.7.33","v6.7.32","v6.7.31","v6.7.30","v6.7.29","v6.7.28","v6.7.27","v6.7.26","v6.7.25","v6.7.24","v6.7.22","v6.7.20","v6.7.19","v6.7.17","v6.7.15","v6.7.14","v6.7.13","v6.7.12","v6.7.11","v6.7.10","v6.7.9","v6.7.8","v6.6.143","v6.6.141","v6.6.140","v6.6.139","v6.6.138","v6.6.137","v6.6.136","v6.6.135","v6.6.134","v6.6.133","v6.6.132","v6.6.131","v6.6.130","v6.6.129","v6.6.128","v6.6.127","v6.6.126","v6.6.125","v6.6.124","v6.6.119","v6.6.118","v6.6.117","v6.6.110","v6.6.107","v6.6.106","v6.6.105","v6.6.104","v6.6.103","v6.6.102","v6.6.100","v6.6.99","v6.6.98","v6.6.97","v6.6.96","v6.6.95","v6.6.94","v6.6.93","v6.6.92","v6.6.91","v6.6.90","v6.6.89","v6.6.88","v6.6.87","v6.6.86","v6.6.85","v6.6.84","v6.6.83","v6.6.82","v6.6.81","v6.6.72","v6.6.71","v6.6.70","v6.6.69","v6.6.68","v6.6.67","v6.6.66","v6.6.65","v6.6.64","v6.6.63","v6.6.62","v6.6.61","v6.6.60","v6.6.59","v6.6.58","v6.6.57","v6.6.56","v6.6.55","v6.6.54","v6.6.53","v6.6.52","v6.6.51","v6.6.50","v6.6.49","v6.6.48","v6.6.47","v6.6.46","v6.6.45","v6.6.44","v6.6.43","v6.6.42","v6.6.41","v6.6.40","v6.6.39","v6.6.38","v6.6.37","v6.6.36","v6.6.35","v6.6.34","v6.6.33","v6.6.32","v6.6.31","v6.6.30","v6.6.29","v6.6.28","v6.6.27","v6.5.96","v6.5.95","v6.5.93","v6.5.92","v6.5.91","v6.5.90","v6.5.89","v6.5.88","v6.5.86","v6.5.85","v6.5.84","v6.5.82","v6.5.81","v6.5.80","v6.5.79","v6.5.78","v6.5.77","v6.5.76","v6.5.75","v6.5.74","v6.5.73","v6.5.72","v6.5.71","v6.5.70","v6.5.69","v6.5.68","v6.5.67","v6.5.66","v6.5.65","v6.5.64","v6.5.63","v6.5.62","v6.5.61","v6.5.60","v6.5.59","v6.5.58",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