{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-34838 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-34838 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-34838 is a critical unsafe deserialization vulnerability in Intermesh groupoffice, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34838 and fix it if it is affected.\n\nWhat it is: CVE-2026-34838 is a critical unsafe deserialization vulnerability in Intermesh groupoffice, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-34838 in the wild and no public exploit code.\n\nAffected product: Intermesh groupoffice. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-34838/ (Markdown: https://insights.sbomify.com/CVE-2026-34838/index.md)","id":"CVE-2026-34838","markdown":"https://insights.sbomify.com/CVE-2026-34838/index.md","name":"CVE-2026-34838","record":{"aliases":["GHSA-h22j-frrf-5vxq"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Group-Office groupware","requires_auth":"low_privilege","summary":"An authenticated attacker can achieve remote code execution by injecting a serialized object into settings, allowing arbitrary file writes on the server.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"group-office","vendor":"intermesh"}],"cvss":{"score":10,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-04-03","github_poc":1,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-03T17:33:47Z","kind":"github_poc","ref":"https://github.com/bamuwe/CVE-2026-34838","stars":1,"title":"CVE-2026-34838 PoC (Proof of Concept)"}],"tier":"poc_unverified"},"has_fix":false,"headline":"Group-Office: Authenticated Remote Code Execution via PHP Insecure Deserialization in `AbstractSettingsCollection`","id":"CVE-2026-34838","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Glances Vulnerable to Cross-Origin Information Disclosure via Unauthenticated REST API (/api/4) due to Permissive CORS","id":"CVE-2026-34839"},"packages":[],"prev":{"headline":"Zammad is miissing authorization in AI assistance controller for context data used in text tools","id":"CVE-2026-34837"},"products":["groupoffice"],"published":"2026-04-02","related":[{"cvss_score":9.4,"headline":"Group-Office Vulnerable to Remote Code Execution (RCE)","id":"CVE-2026-27947","kev_date_added":null,"published":"2026-02-27"},{"cvss_score":8.8,"headline":"Authenticated SQL Injection in Contact/query addressBookIds filter","id":"CVE-2026-33755","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":7.5,"headline":"SQL injection in n/a","id":"CVE-2010-3428","kev_date_added":null,"published":"2010-09-16"},{"cvss_score":7.1,"headline":"Group-Office Has Authenticated SQL Injection in advancedQueryData.comparator","id":"CVE-2026-27832","kev_date_added":null,"published":"2026-02-27"},{"cvss_score":6.9,"headline":"GroupOffice's Blind Stored XSS in Phone Number Field Enables Forced Redirect and Unauthorized Actions","id":"CVE-2025-48366","kev_date_added":null,"published":"2025-05-22"},{"cvss_score":5.8,"headline":"GroupOffice's DOM-Based XSS in all Date Input Fields Allows Arbitrary JavaScript Execution","id":"CVE-2025-48368","kev_date_added":null,"published":"2025-05-22"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-03","vendors":["Intermesh"]},"summary":"An authenticated attacker can achieve remote code execution by injecting a serialized object into settings, allowing arbitrary file writes on the server.","url":"https://insights.sbomify.com/CVE-2026-34838/"}