{"answers":{"affected":"3 open source packages ship an affected version, including github.com/free5gc/udr. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44323 in the wild and no public exploit code.","fix":"Upgrade github.com/free5gc/udr to 1.4.3 or later.","what":"CVE-2026-44323 is a medium-severity vulnerability in Free5gc Free5gc, published on 27 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-2026-44323 and fix it if it is affected.\n\nWhat it is: CVE-2026-44323 is a medium-severity vulnerability in Free5gc Free5gc, published on 27 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-2026-44323 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/free5gc/udr (Go): affected all versions; fixed in 1.4.3\n- github.com/free5gc/udr (Go): affected all versions; fixed in 1.4.3\n- github.com/free5gc/udr (Go): affected all versions; fixed in 1.4.3\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-2026-44323/ (Markdown: https://insights.sbomify.com/CVE-2026-44323/index.md)","id":"CVE-2026-44323","markdown":"https://insights.sbomify.com/CVE-2026-44323/index.md","name":"CVE-2026-44323","record":{"aliases":["GHSA-4rqf-grm6-vf75","GO-2026-5131"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"5G core network","requires_auth":"low_privilege","summary":"An authenticated attacker can cause a denial of service in free5GC UDR by triggering a nil pointer dereference via a specific DELETE request.","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":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's UDR nudr-dr DELETE /subscription-data/{ueId}/{servingPlmnId}/ee-subscriptions/{subsId}/amf-subscriptions handler contains a nil-pointer dereference reachable from a single authenticated request, after one preparatory authenticated EE-subscription create. The handler checks _, ok = UESubsData.EeSubscriptionCollection[subsId] and sets a 404 problem-details on the miss path, but then continues to UESubsData.EeSubscriptionCollection[subsId].AmfSubscriptionInfos -- dereferencing the same missing entry instead of returning. Gin recovery converts the panic into HTTP 500, but the endpoint remains repeatedly panicable. This vulnerability is fixed in 4.2.2.","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: UDR nudr-dr DELETE amf-subscriptions panics on missing subsId when UE state exists (nil pointer dereference)","id":"CVE-2026-44323","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's UDR nudr-dr DELETE amf-subscriptions panics on missing UE state via nil interface type assertion (single authenticated request)","id":"CVE-2026-44324"},"packages":[{"ecosystem":"Go","fixed":["1.4.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udr","purl":null,"source":"GHSA-4rqf-grm6-vf75"},{"ecosystem":"Go","fixed":["1.4.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","source":"GHSA-4rqf-grm6-vf75"},{"ecosystem":"Go","fixed":["1.4.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","source":"GO-2026-5131"}],"prev":{"headline":"free5GC's NEF 3gpp-pfd-management PATCH applications/{appId} panics on UDR access failure due to nil ProblemDetails dereference","id":"CVE-2026-44322"},"products":["free5gc"],"published":"2026-05-27","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-01","vendors":["free5gc"]},"summary":"An authenticated attacker can cause a denial of service in free5GC UDR by triggering a nil pointer dereference via a specific DELETE request.","url":"https://insights.sbomify.com/CVE-2026-44323/"}