{"answers":{"affected":"3 open source packages ship an affected version, including github.com/free5gc/udm. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33064 exists.","fix":"Upgrade github.com/free5gc/udm to 1.4.2 or later.","what":"CVE-2026-33064 is a high-severity vulnerability in free5gc, published on 20 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-2026-33064 and fix it if it is affected.\n\nWhat it is: CVE-2026-33064 is a high-severity vulnerability in free5gc, published on 20 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-2026-33064 exists.\n\nAffected packages and fixed versions:\n- github.com/free5gc/udm (Go): affected all versions; fixed in 1.4.2\n- github.com/free5gc/udm (Go): affected all versions; fixed in 1.4.2\n- github.com/free5gc/udm (Go): affected all versions; fixed in 1.4.2\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-2026-33064/ (Markdown: https://insights.sbomify.com/CVE-2026-33064/index.md)","id":"CVE-2026-33064","markdown":"https://insights.sbomify.com/CVE-2026-33064/index.md","name":"CVE-2026-33064","record":{"aliases":["GHSA-7g27-v5wj-jr75","GO-2026-4757","ROOT-OS-UBUNTU-2204-CVE-2026-33064"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"5G core network software","requires_auth":"none","summary":"Remote attackers can crash the free5GC UDM service by sending crafted requests to the sdm-subscriptions endpoint, causing a denial of service.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"udm","vendor":"free5gc"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"},{"id":"CWE-478","name":"Missing Default Case in Multiple Condition Expression"}],"description":"Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with \"runtime error: invalid memory address or nil pointer dereference\". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference","id":"CVE-2026-33064","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request","id":"CVE-2026-33065"},"packages":[{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udm","purl":null,"source":"GHSA-7g27-v5wj-jr75"},{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udm","purl":"pkg:golang/github.com/free5gc/udm","source":"GHSA-7g27-v5wj-jr75"},{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udm","purl":"pkg:golang/github.com/free5gc/udm","source":"GO-2026-4757"}],"prev":{"headline":"free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion","id":"CVE-2026-33063"},"products":["free5gc"],"published":"2026-03-20","related":[{"cvss_score":8.7,"headline":"free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal Server Error","id":"CVE-2026-33191","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":8.7,"headline":"free5GC UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptions reques","id":"CVE-2026-33192","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":7.5,"headline":"free5GC udm vulnerable to Invalid Curve Attack","id":"CVE-2023-46324","kev_date_added":null,"published":"2023-10-23"},{"cvss_score":6.9,"headline":"free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request","id":"CVE-2026-33065","kev_date_added":null,"published":"2026-03-20"},{"cvss_score":6.6,"headline":"free5GC has Improper Input Validation in UDM UEAU Service","id":"CVE-2026-27642","kev_date_added":null,"published":"2026-02-24"},{"cvss_score":6.6,"headline":"free5GC has Improper Error Handling in UDM, Leading to Information Exposure","id":"CVE-2025-69250","kev_date_added":null,"published":"2026-02-23"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"2026-03-20","vendors":["free5gc"]},"summary":"Remote attackers can crash the free5GC UDM service by sending crafted requests to the sdm-subscriptions endpoint, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-33064/"}