{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-11946 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-11946 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-11946 is a high-severity denial of service vulnerability in open62541, published on 2 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-2026-11946 and fix it if it is affected.\n\nWhat it is: CVE-2026-11946 is a high-severity denial of service vulnerability in open62541, published on 2 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-2026-11946 in the wild and no public exploit code.\n\nAffected product: open62541. 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-2026-11946/ (Markdown: https://insights.sbomify.com/CVE-2026-11946/index.md)","id":"CVE-2026-11946","markdown":"https://insights.sbomify.com/CVE-2026-11946/index.md","name":"CVE-2026-11946","record":{"aliases":["DEBIAN-CVE-2026-11946","GHSA-qwmm-q68h-5qf6","UBUNTU-CVE-2026-11946"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OPC UA library","requires_auth":"none","summary":"Unauthenticated attackers can exhaust server memory in open62541 by sending oversized GetEndpoints requests, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"ENISA","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-789","name":"Memory Allocation with Excessive Size Value"},{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"An unauthenticated remote attacker can exhaust\nserver memory via the GetEndpoints Discovery Service in open62541. The\nendpointUrl field of GetEndpointsRequest is not validated for length. An\nattacker can declare an arbitrarily large string (up to ~4.09 GB via the UInt32\nlength field) delivered across intermediate chunks without ever sending the\nfinal chunk. The server buffers all chunks in RAM indefinitely until the\nSecureChannel times out. The attack is\npre-session and bypasses all encryption configurations.\n\nThe issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.","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":"GetEndpoints Memory Exhaustion in open62541","id":"CVE-2026-11946","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2026-11947"},"packages":[],"prev":{"headline":"PostgreSQL Anonymizer: SQL injection in the rules import functions","id":"CVE-2026-11945"},"products":["open62541"],"published":"2026-07-02","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-02","vendors":["open62541 project / o6 Automation GmbH"]},"summary":"Unauthenticated attackers can exhaust server memory in open62541 by sending oversized GetEndpoints requests, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-11946/"}