{"answers":{"affected":"3 open source packages ship an affected version, including github.com/free5gc/ausf. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-33063 in the wild and no public exploit code.","fix":"Upgrade github.com/free5gc/ausf to 1.4.2 or later.","what":"CVE-2026-33063 is a high-severity vulnerability in Free5gc 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-2026-33063 and fix it if it is affected.\n\nWhat it is: CVE-2026-33063 is a high-severity vulnerability in Free5gc Free5gc, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-33063 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/free5gc/ausf (Go): affected all versions; fixed in 1.4.2\n- github.com/free5gc/ausf (Go): affected all versions; fixed in 1.4.2\n- github.com/free5gc/ausf (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-2026-33063/ (Markdown: https://insights.sbomify.com/CVE-2026-33063/index.md)","id":"CVE-2026-33063","markdown":"https://insights.sbomify.com/CVE-2026-33063/index.md","name":"CVE-2026-33063","record":{"aliases":["GHSA-4jrw-92fg-4jwx","GO-2026-4754"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"5G core network","requires_auth":"none","summary":"Remote attackers can crash the free5GC AUSF authentication service by sending crafted requests that trigger a nil interface conversion panic.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"free5gc","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"}],"description":"free5GC is an open source 5G core network. free5GC AUSF prior to version 1.4.2 has is an Improper Null Check vulnerability leading to Denial of Service. All deployments of free5GC v4.0.1 using the AUSF UE authentication service (`/nausf-auth/v1/ue-authentications` endpoint) are affected. A remote attacker can cause the AUSF service to panic and crash by sending a crafted UE authentication request that triggers a nil interface conversion in the `GetSupiFromSuciSupiMap` function. This results in complete denial of service for the AUSF authentication service. The `GetSupiFromSuciSupiMap` function attempts to perform an interface conversion from `interface{}` to `*context.SuciSupiMap` without checking if the underlying value is nil. When `SuciSupiMap` is nil, the code panics with \"interface conversion: interface {} is nil, not *context.SuciSupiMap\". free5GC AUSF version 1.4.2 patches the issue.  There is no direct workaround at the application level. The recommendation is to apply the provided patch or restrict access to the AUSF API to trusted sources only.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion","id":"CVE-2026-33063","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"free5gc:free5gc","products":["free5gc:free5gc"],"type":"null_dereference","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference","id":"CVE-2026-33064"},"packages":[{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/ausf","purl":null,"source":"GHSA-4jrw-92fg-4jwx"},{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/ausf","purl":"pkg:golang/github.com/free5gc/ausf","source":"GHSA-4jrw-92fg-4jwx"},{"ecosystem":"Go","fixed":["1.4.2"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/ausf","purl":"pkg:golang/github.com/free5gc/ausf","source":"GO-2026-4754"}],"prev":{"headline":"free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter","id":"CVE-2026-33062"},"products":["ausf"],"published":"2026-03-20","related":[{"cvss_score":10,"headline":"free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM handler","id":"CVE-2026-44327","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":10,"headline":"free5GC's SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers","id":"CVE-2026-44329","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":10,"headline":"free5GC's NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions","id":"CVE-2026-44330","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2025-63679","kev_date_added":null,"published":"2025-11-12"},{"cvss_score":9.4,"headline":"free5GC's NEF 3gpp-pfd-management API is unauthenticated; forged bearer tokens can create, read, and delete PFD transactions","id":"CVE-2026-44315","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":9.4,"headline":"free5GC's NEF 3gpp-traffic-influence API is unauthenticated; missing or forged bearer tokens can create, read, patch, and delete subscriptions","id":"CVE-2026-44326","kev_date_added":null,"published":"2026-05-27"},{"cvss_score":8.7,"headline":"free5gc UDR improper path validation allows unauthenticated access to Traffic Influence Subscriptions","id":"CVE-2026-40247","kev_date_added":null,"published":"2026-04-16"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-20","vendors":["free5gc"]},"summary":"Remote attackers can crash the free5GC AUSF authentication service by sending crafted requests that trigger a nil interface conversion panic.","url":"https://insights.sbomify.com/CVE-2026-33063/"}