{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-14586 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-14586 is a medium-severity denial of service vulnerability in NLnet Labs Unbound, published on 22 Jul 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-2026-14586 and fix it if it is affected.\n\nWhat it is: CVE-2026-14586 is a medium-severity denial of service vulnerability in NLnet Labs Unbound, published on 22 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-14586 in the wild and no public exploit code.\n\nAffected product: NLnet Labs Unbound. 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-2026-14586/ (Markdown: https://insights.sbomify.com/CVE-2026-14586/index.md)","id":"CVE-2026-14586","markdown":"https://insights.sbomify.com/CVE-2026-14586/index.md","name":"CVE-2026-14586","record":{"aliases":["AZL-92967","DEBIAN-CVE-2026-14586","ECHO-e518-e2e7-e89c","GHSA-x2gg-pjp4-c6g3","UBUNTU-CVE-2026-14586"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"DNS resolver","requires_auth":"none","summary":"An assertion failure in libngtcp2 causes Unbound to terminate under high concurrency in DNS-over-QUIC environments, resulting in denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NLnet Labs","cpe":[],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, in DNS-over-QUIC environments, with high concurrency and under pressure, an assertion in libngtcp2 about monotonic timestamps could trigger and result in server termination and thus denial of service. When interfacing with libngtcp2, for DNS-over-QUIC support in Unbound, it is expected to use monotonic time. Unbound was using realtime instead, and in DoQ environments with high concurrency and under pressure, an assert in libngtcp2 for the quic timestamp would trigger and terminate the server.This vulnerability needs Unbound to be compiled with DoQ support ('--with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Assertion in libngtcp2 when under pressure in high concurrency DNS-over-QUIC environments","id":"CVE-2026-14586","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Unathenticated connection can hold Bolt channel open","id":"CVE-2026-14587"},"packages":[],"prev":{"headline":"In Eclipse Theia versions 0.7.0 and up until including 1.73.1, the `PreferenceUtils.merge` function in `@theia/core` recursively merges pref","id":"CVE-2026-14574"},"products":["Unbound"],"published":"2026-07-22","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":"partial"},"state":"PUBLISHED","updated":"2026-07-22","vendors":["NLnet Labs"]},"summary":"An assertion failure in libngtcp2 causes Unbound to terminate under high concurrency in DNS-over-QUIC environments, resulting in denial of service.","url":"https://insights.sbomify.com/CVE-2026-14586/"}