{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-11771 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-11771 is a high-severity memory corruption vulnerability in OpenVPN, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-11771 and fix it if it is affected.\n\nWhat it is: CVE-2026-11771 is a high-severity memory corruption vulnerability in OpenVPN, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-11771 in the wild and no public exploit code.\n\nAffected product: OpenVPN. 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-2026-11771/ (Markdown: https://insights.sbomify.com/CVE-2026-11771/index.md)","id":"CVE-2026-11771","markdown":"https://insights.sbomify.com/CVE-2026-11771/index.md","name":"CVE-2026-11771","record":{"aliases":["ALPINE-CVE-2026-11771","DEBIAN-CVE-2026-11771","GHSA-v8ww-fhqp-9vff","UBUNTU-CVE-2026-11771"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"OpenVPN client","requires_auth":"none","summary":"Attackers can cause a crash in OpenVPN clients via a crafted NTLM response from a malicious proxy server due to an off-by-one buffer write.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"OpenVPN","cpe":[{"product":"openvpn","vendor":"openvpn"}],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-193","name":"Off-by-one Error"},{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server","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":"Memory corruption in OpenVPN","id":"CVE-2026-11771","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"Reflected XSS in DRIMO CMS","id":"CVE-2026-11772"},"packages":[],"prev":{"headline":"389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check","id":"CVE-2026-11770"},"products":["OpenVPN"],"published":"2026-07-30","related":[{"cvss_score":9.1,"headline":"Memory corruption in OpenVPN","id":"CVE-2025-12106","kev_date_added":null,"published":"2025-12-01"},{"cvss_score":9.1,"headline":"Information disclosure in OpenVPN","id":"CVE-2024-5594","kev_date_added":null,"published":"2025-01-06"},{"cvss_score":9.1,"headline":"Cross-site request forgery in n/a","id":"CVE-2018-7544","kev_date_added":null,"published":"2018-03-16"},{"cvss_score":9,"headline":"Code injection in n/a","id":"CVE-2006-1629","kev_date_added":null,"published":"2006-04-06"},{"cvss_score":8.8,"headline":"Privilege escalation in OpenVPN","id":"CVE-2024-4877","kev_date_added":null,"published":"2025-04-03"},{"cvss_score":7.8,"headline":"Code injection in OpenVPN-GUI","id":"CVE-2021-3606","kev_date_added":null,"published":"2021-07-02"},{"cvss_score":7.8,"headline":"Use after free in n/a","id":"CVE-2018-9336","kev_date_added":null,"published":"2018-05-01"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-30","vendors":["OpenVPN"]},"summary":"Attackers can cause a crash in OpenVPN clients via a crafted NTLM response from a malicious proxy server due to an off-by-one buffer write.","url":"https://insights.sbomify.com/CVE-2026-11771/"}