{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8266 exists.","fix":"No fix has been published for CVE-2026-8266 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-8266 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 11 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-2026-8266 and fix it if it is affected.\n\nWhat it is: CVE-2026-8266 is a medium-severity denial of service vulnerability in Open5gs Open5gs, published on 11 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-8266 exists.\n\nAffected product: Open5gs Open5gs. 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-2026-8266/ (Markdown: https://insights.sbomify.com/CVE-2026-8266/index.md)","id":"CVE-2026-8266","markdown":"https://insights.sbomify.com/CVE-2026-8266/index.md","name":"CVE-2026-8266","record":{"aliases":["GHSA-cpxg-2cqw-2wjq"],"analysis":{"component_type":"server_software","fix_type":"no_fix_stated","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"5G core network software","requires_auth":"low_privilege","summary":"Remote attackers can cause a denial of service in Open5GS SMF via the gsm_build_pdu_session_establishment_accept function.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[{"product":"open5gs","vendor":"open5gs"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-404","name":"Improper Resource Shutdown or Release"}],"description":"A vulnerability was detected in Open5GS up to 2.7.7. This affects the function gsm_build_pdu_session_establishment_accept of the file /src/smf/gsm-build.c of the component SMF. The manipulation results in denial of service. The attack can be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Open5GS SMF gsm-build.c gsm_build_pdu_session_establishment_accept denial of service","id":"CVE-2026-8266","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"open5gs:open5gs","products":["open5gs:open5gs"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Open5GS SMF smf_nsmf_handle_created_data_in_vsmf denial of service","id":"CVE-2026-8267"},"packages":[],"prev":{"headline":"Tenda AC6 httpd getLogFile get_log_file os command injection","id":"CVE-2026-8265"},"products":["Open5GS"],"published":"2026-05-11","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-40130","kev_date_added":null,"published":"2024-07-16"},{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2021-28122","kev_date_added":null,"published":"2021-03-10"},{"cvss_score":8.8,"headline":"Hardcoded credentials in n/a","id":"CVE-2021-25863","kev_date_added":null,"published":"2021-01-26"},{"cvss_score":8.7,"headline":"Reachable Assertion vulnerability in Open5GS","id":"CVE-2025-41067","kev_date_added":null,"published":"2025-10-27"},{"cvss_score":8.7,"headline":"Reachable Assertion vulnerability in Open5GS","id":"CVE-2025-41068","kev_date_added":null,"published":"2025-10-27"},{"cvss_score":8.6,"headline":"Denial of service in n/a","id":"CVE-2023-37015","kev_date_added":null,"published":"2025-01-22"},{"cvss_score":8.6,"headline":"Denial of service in n/a","id":"CVE-2023-37016","kev_date_added":null,"published":"2025-01-22"}],"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-12","vendors":["n/a"]},"summary":"Remote attackers can cause a denial of service in Open5GS SMF via the gsm_build_pdu_session_establishment_accept function.","url":"https://insights.sbomify.com/CVE-2026-8266/"}