{"answers":{"affected":"3 open source packages ship an affected version, including github.com/free5gc/amf. It affects 2 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41136 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-41136 is a medium-severity vulnerability in Free5gc Free5gc, published on 21 Apr 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-2026-41136 and fix it if it is affected.\n\nWhat it is: CVE-2026-41136 is a medium-severity vulnerability in Free5gc Free5gc, published on 21 Apr 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-2026-41136 exists.\n\nAffected packages and fixed versions:\n- github.com/free5gc/amf (Go): affected all versions; no fix listed\n- github.com/free5gc/amf (Go): affected all versions up to 1.4.3; no fix listed\n- github.com/free5gc/amf (Go): affected all versions up to 1.4.3; no fix listed\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-2026-41136/ (Markdown: https://insights.sbomify.com/CVE-2026-41136/index.md)","id":"CVE-2026-41136","markdown":"https://insights.sbomify.com/CVE-2026-41136/index.md","name":"CVE-2026-41136","record":{"aliases":["GHSA-r99v-75p9-xqm5","GO-2026-5613"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service","other"],"network_reachable":"yes","non_default_config":false,"product_category":"5G core network AMF","requires_auth":"none","summary":"Attackers can send requests with unsupported Content-Type headers to cause the AMF to process uninitialized objects, potentially leading to crashes or undefined behavior.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"amf","vendor":"free5gc"},{"product":"free5gc","vendor":"free5gc"}],"cvss":{"score":5.5,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-440","name":"Expected Behavior Violation"}],"description":"free5GC AMF provides Access \u0026 Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix.","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 AMF missing default case in Content-Type switch in HTTPUEContextTransfer","id":"CVE-2026-41136","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":"free5gc:free5gc","products":["free5gc:free5gc"],"type":"other","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Flowise: Code Injection in CSVAgent leads to Authenticated RCE","id":"CVE-2026-41137"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/free5gc/amf","purl":"pkg:golang/github.com/free5gc/amf","source":"GO-2026-5613"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.4.3"],"package":"github.com/free5gc/amf","purl":null,"source":"GHSA-r99v-75p9-xqm5"},{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":["1.4.3"],"package":"github.com/free5gc/amf","purl":"pkg:golang/github.com/free5gc/amf","source":"GHSA-r99v-75p9-xqm5"}],"prev":{"headline":"free5GC PCF: Memory Leak via CORS Middleware Registration in HTTP Handler Leads to Denial of Service","id":"CVE-2026-41135"},"products":["amf"],"published":"2026-04-21","related":[{"cvss_score":6.6,"headline":"free5GC has Array Index Out of Bounds in AMF Leading to Denial of Service","id":"CVE-2025-69248","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":"2026-04-22","vendors":["free5gc"]},"summary":"Attackers can send requests with unsupported Content-Type headers to cause the AMF to process uninitialized objects, potentially leading to crashes or undefined behavior.","url":"https://insights.sbomify.com/CVE-2026-41136/"}