{"answers":{"affected":"3 open source packages ship an affected version, including github.com/free5gc/nef. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44319 exists.","fix":"Upgrade github.com/free5gc/nef to 1.2.3 or later.","what":"CVE-2026-44319 is a high-severity denial of service vulnerability in Free5gc Free5gc, published on 27 May 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-2026-44319 and fix it if it is affected.\n\nWhat it is: CVE-2026-44319 is a high-severity denial of service vulnerability in Free5gc Free5gc, published on 27 May 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-2026-44319 exists.\n\nAffected packages and fixed versions:\n- github.com/free5gc/nef (Go): affected all versions; fixed in 1.2.3\n- github.com/free5gc/nef (Go): affected all versions; fixed in 1.2.3\n- github.com/free5gc/nef (Go): affected all versions; fixed in 1.2.3\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-2026-44319/ (Markdown: https://insights.sbomify.com/CVE-2026-44319/index.md)","id":"CVE-2026-44319","markdown":"https://insights.sbomify.com/CVE-2026-44319/index.md","name":"CVE-2026-44319","record":{"aliases":["GHSA-rxrq-fv76-26pr","GO-2026-5647"],"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":"none","summary":"An attacker can crash the free5GC NEF component by triggering a notification delivery failure, causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"free5gc","vendor":"free5gc"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions"},{"id":"CWE-617","name":"Reachable Assertion"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF terminates the entire process when a stored PFD-subscription notifyUri cannot be reached. In PfdChangeNotifier.FlushNotifications(), the notifier calls NnefPFDmanagementNotify(...) and on any delivery error invokes logger.PFDManageLog.Fatal(err), which is os.Exit(1)-equivalent in Go. An attacker who can create a PFD subscription with an attacker-chosen notifyUri and then trigger a PFD change can deterministically kill NEF on the asynchronous delivery attempt -- the process exits with status 1, dropping NEF's entire SBI surface until restart. 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":"weaponised"},"has_fix":true,"headline":"free5GC: NEF crashes via logger.Fatal on PFD notification delivery failure (attacker-controlled notifyUri)","id":"CVE-2026-44319","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"free5gc:free5gc","products":["free5gc:free5gc"],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":4,"next":{"headline":"free5GC's NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path","id":"CVE-2026-44320"},"packages":[{"ecosystem":"Go","fixed":["1.2.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/nef","purl":null,"source":"GHSA-rxrq-fv76-26pr"},{"ecosystem":"Go","fixed":["1.2.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","source":"GHSA-rxrq-fv76-26pr"},{"ecosystem":"Go","fixed":["1.2.3"],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","source":"GO-2026-5647"}],"prev":{"headline":"free5GC's BSF concurrent PUT /nbsf-management/v1/subscriptions/{subId} crashes the BSF process via concurrent map read/write on Subscriptions","id":"CVE-2026-44318"},"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-28","vendors":["free5gc"]},"summary":"An attacker can crash the free5GC NEF component by triggering a notification delivery failure, causing a denial of service.","url":"https://insights.sbomify.com/CVE-2026-44319/"}