{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18784 exists.","fix":"No fix has been published for CVE-2026-18784 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-18784 is a medium-severity memory corruption vulnerability in o6 open62541, published on 4 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-18784 and fix it if it is affected.\n\nWhat it is: CVE-2026-18784 is a medium-severity memory corruption vulnerability in o6 open62541, published on 4 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18784 exists.\n\nAffected product: o6 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-2026-18784/ (Markdown: https://insights.sbomify.com/CVE-2026-18784/index.md)","id":"CVE-2026-18784","markdown":"https://insights.sbomify.com/CVE-2026-18784/index.md","name":"CVE-2026-18784","record":{"aliases":["DEBIAN-CVE-2026-18784","GHSA-r2hr-h3px-675c","UBUNTU-CVE-2026-18784"],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"open62541 OPC UA library","requires_auth":"low_privilege","summary":"A heap-based buffer overflow in open62541 allows local attackers to execute arbitrary code or cause denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A vulnerability was found in o6 open62541 up to 1.5.5. This issue affects the function UA_Client_readNodeClassAttribute of the file src/client/ua_client_highlevel.c. Performing a manipulation results in heap-based buffer overflow. Attacking locally is a requirement. The exploit has been made public and could be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"o6 open62541 ua_client_highlevel.c UA_Client_readNodeClassAttribute heap-based overflow","id":"CVE-2026-18784","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"o6 open62541 client_types_custom.c UA_Client_getRemoteDataTypes use after free","id":"CVE-2026-18785"},"packages":[],"prev":{"headline":"Missing Server-Side Authentication on REST API Endpoint in Trex Digital Manufacturing's Trex MES","id":"CVE-2026-18783"},"products":["open62541"],"published":"2026-08-04","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["o6"]},"summary":"A heap-based buffer overflow in open62541 allows local attackers to execute arbitrary code or cause denial of service.","url":"https://insights.sbomify.com/CVE-2026-18784/"}