{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4959 exists.","fix":"No fix has been published for CVE-2026-4959 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-4959 is a medium-severity missing authorization vulnerability in OpenBMB XAgent, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-4959 and fix it if it is affected.\n\nWhat it is: CVE-2026-4959 is a medium-severity missing authorization vulnerability in OpenBMB XAgent, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4959 exists.\n\nAffected product: OpenBMB XAgent. 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-2026-4959/ (Markdown: https://insights.sbomify.com/CVE-2026-4959/index.md)","id":"CVE-2026-4959","markdown":"https://insights.sbomify.com/CVE-2026-4959/index.md","name":"CVE-2026-4959","record":{"aliases":["GHSA-7355-47hq-rrv2"],"analysis":{"component_type":"web_application","fix_type":"no_fix_stated","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"XAgent ShareServer","requires_auth":"none","summary":"Attackers can bypass authentication on the XAgent ShareServer WebSocket endpoint by manipulating the interaction_id argument.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"xagent","vendor":"openbmb"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-306","name":"Missing Authentication for Critical Functionality"},{"id":"CWE-287","name":"Improper Authentication"}],"description":"A vulnerability was found in OpenBMB XAgent 1.0.0. This impacts the function check_user of the file XAgentServer/application/websockets/share.py of the component ShareServer WebSocket Endpoint. Performing a manipulation of the argument interaction_id results in missing authentication. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication","id":"CVE-2026-4959","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"missing_authorization","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Tenda AC6 POST Request WizardHandle fromWizardHandle stack-based overflow","id":"CVE-2026-4960"},"packages":[],"prev":{"headline":"OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization","id":"CVE-2026-4958"},"products":["XAgent"],"published":"2026-03-27","related":[{"cvss_score":5.3,"headline":"OpenBMB XAgent Privileged Mode sandbox","id":"CVE-2024-2007","kev_date_added":null,"published":"2024-02-29"},{"cvss_score":5.1,"headline":"OpenBMB XAgent API Key function_handler.py FunctionHandler.handle_tool_call log file","id":"CVE-2026-4957","kev_date_added":null,"published":"2026-03-27"},{"cvss_score":5.1,"headline":"OpenBMB XAgent community path traversal","id":"CVE-2025-6281","kev_date_added":null,"published":"2025-06-19"},{"cvss_score":2.3,"headline":"OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization","id":"CVE-2026-4958","kev_date_added":null,"published":"2026-03-27"}],"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-31","vendors":["OpenBMB"]},"summary":"Attackers can bypass authentication on the XAgent ShareServer WebSocket endpoint by manipulating the interaction_id argument.","url":"https://insights.sbomify.com/CVE-2026-4959/"}