{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-38821 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-38821 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-38821 is a high-severity memory corruption vulnerability in openNDS, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-38821 and fix it if it is affected.\n\nWhat it is: CVE-2026-38821 is a high-severity memory corruption vulnerability in openNDS, published on 28 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-38821 in the wild and no public exploit code.\n\nAffected product: openNDS. 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-2026-38821/ (Markdown: https://insights.sbomify.com/CVE-2026-38821/index.md)","id":"CVE-2026-38821","markdown":"https://insights.sbomify.com/CVE-2026-38821/index.md","name":"CVE-2026-38821","record":{"aliases":["DEBIAN-CVE-2026-38821","GHSA-rm65-3jj4-3vcm","UBUNTU-CVE-2026-38821"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"openNDS captive portal","requires_auth":"none","summary":"An unauthenticated attacker can crash the openNDS daemon or potentially execute code via a heap-based buffer overflow in the captive portal network.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"A heap-based buffer overflow vulnerability exists in openNDS before 11.0.0 that allows an unauthenticated attacker on the captive portal network to crash the openNDS daemon (denial of service) and potentially achieve remote code execution. This is in http_microhttpd.c.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Memory corruption in openNDS","id":"CVE-2026-38821","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Command injection in openNDS","id":"CVE-2026-38822"},"packages":[],"prev":{"headline":"Command injection in openNDS","id":"CVE-2026-38820"},"products":["openNDS"],"published":"2026-08-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"total"},"state":"PUBLISHED","updated":"2026-08-28","vendors":["openNDS"]},"summary":"An unauthenticated attacker can crash the openNDS daemon or potentially execute code via a heap-based buffer overflow in the captive portal network.","url":"https://insights.sbomify.com/CVE-2026-38821/"}