{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-116539 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-116539 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-116539 is a high-severity vulnerability in netty-tcnative, published on 26 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-116539 and fix it if it is affected.\n\nWhat it is: CVE-2026-116539 is a high-severity vulnerability in netty-tcnative, published on 26 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-116539 in the wild and no public exploit code.\n\nAffected product: netty-tcnative. 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-2026-116539/ (Markdown: https://insights.sbomify.com/CVE-2026-116539/index.md)","id":"CVE-2026-116539","markdown":"https://insights.sbomify.com/CVE-2026-116539/index.md","name":"CVE-2026-116539","record":{"aliases":["DEBIAN-CVE-2026-116539","GHSA-22qq-f4wc-4vfx","GHSA-gf9q-9mg7-g5qh","UBUNTU-CVE-2026-116539"],"analysis":null,"analysis_generated_by":null,"assigner":"VulnCheck","cpe":[],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"Netty netty-tcnative before 2.0.84.Final contains a heap buffer overflow vulnerability in the tcn_write_to_bytebuffer BIO callback caused by failing to wrap the non-application ring buffer write index. Remote TLS peers can drive handshake, renegotiation, or post-handshake messages into this buffer, triggering an out-of-bounds memcpy that crashes the JVM process.","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":"Netty netty-tcnative before 2.0.84.Final Heap Buffer Overflow via OpenSSL BIO","id":"CVE-2026-116539","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback","id":"CVE-2026-116540"},"packages":[],"prev":{"headline":"HtmlSanitizer before 9.2.1039 XSS via SanitizeDom Body and HTML Attributes","id":"CVE-2026-116538"},"products":["netty-tcnative","netty-tcnative-boringssl-static"],"published":"2026-10-26","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-26","vendors":["netty"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-116539/"}