{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-33592 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-33592 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-33592 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-2026-33592 and fix it if it is affected.\n\nWhat it is: CVE-2026-33592 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-2026-33592 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-2026-33592/ (Markdown: https://insights.sbomify.com/CVE-2026-33592/index.md)","id":"CVE-2026-33592","markdown":"https://insights.sbomify.com/CVE-2026-33592/index.md","name":"CVE-2026-33592","record":{"aliases":["DEBIAN-CVE-2026-33592","GHSA-r94m-59fw-hm34","UBUNTU-CVE-2026-33592"],"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":"An unauthenticated remote attacker can exhaust server memory in open62541 by sending large FindServers 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 FindServers Discovery Service in open62541. The\nserverUris field of FindServersRequest is not validated for length or array\nsize. An attacker can declare an arbitrarily large string (up to ~3.9 GB)\ndelivered across intermediate chunks without ever sending the final chunk. The\nserver buffers all chunks in RAM indefinitely until the SecureChannel times\nout. The attack is pre-session and bypasses all encryption configuration. The 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":"FindServers Memory Exhaustion in open62541","id":"CVE-2026-33592","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":"Denial of service via crafted DNSCrypt query","id":"CVE-2026-33593"},"packages":[],"prev":{"headline":"Authentication bypass on WaptServer","id":"CVE-2026-33591"},"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":"An unauthenticated remote attacker can exhaust server memory in open62541 by sending large FindServers requests, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-33592/"}