{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-35439 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-35439 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-35439 is a high-severity unsafe deserialization vulnerability in Microsoft Sharepoint Server, published on 12 May 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-35439 and fix it if it is affected.\n\nWhat it is: CVE-2026-35439 is a high-severity unsafe deserialization vulnerability in Microsoft Sharepoint Server, published on 12 May 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-2026-35439 in the wild and no public exploit code.\n\nAffected product: Microsoft Sharepoint Server. 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-2026-35439/ (Markdown: https://insights.sbomify.com/CVE-2026-35439/index.md)","id":"CVE-2026-35439","markdown":"https://insights.sbomify.com/CVE-2026-35439/index.md","name":"CVE-2026-35439","record":{"aliases":["GHSA-x84h-h468-6jpc"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"SharePoint Server","requires_auth":"low_privilege","summary":"An authorized attacker can execute arbitrary code remotely via unsafe deserialization in Microsoft SharePoint Server.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"microsoft","cpe":[{"product":"sharepoint_server","vendor":"microsoft"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Deserialization of untrusted data in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Microsoft SharePoint Server Remote Code Execution Vulnerability","id":"CVE-2026-35439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"microsoft:sharepoint_server","products":["microsoft:sharepoint_server"],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Microsoft Word Information Disclosure Vulnerability","id":"CVE-2026-35440"},"packages":[],"prev":{"headline":"Windows Admin Center Elevation of Privilege Vulnerability","id":"CVE-2026-35438"},"products":["Microsoft SharePoint Enterprise Server 2016","Microsoft SharePoint Server 2019","Microsoft SharePoint Server Subscription Edition"],"published":"2026-05-12","related":[{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data Vulnerability","id":"CVE-2026-50522","kev_date_added":"2026-07-22","published":"2026-07-14"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2026-58644","kev_date_added":"2026-07-16","published":"2026-07-14"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2026-20963","kev_date_added":"2026-03-18","published":"2026-01-13"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Deserialization of Untrusted Data","id":"CVE-2025-53770","kev_date_added":"2025-07-20","published":"2025-07-20"},{"cvss_score":9.8,"headline":"Microsoft SharePoint Server Privilege Escalation","id":"CVE-2023-29357","kev_date_added":"2024-01-10","published":"2023-06-13"},{"cvss_score":9.1,"headline":"Microsoft SharePoint Weak Authentication","id":"CVE-2026-55040","kev_date_added":"2026-08-18","published":"2026-07-14"},{"cvss_score":8.8,"headline":"Microsoft SharePoint Code Injection","id":"CVE-2026-65660","kev_date_added":"2026-09-25","published":"2026-08-11"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-10","vendors":["Microsoft"]},"summary":"An authorized attacker can execute arbitrary code remotely via unsafe deserialization in Microsoft SharePoint Server.","url":"https://insights.sbomify.com/CVE-2026-35439/"}