{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-44041 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-44041 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-44041 is a medium-severity memory corruption vulnerability in uvnc UltraVNC, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-44041 and fix it if it is affected.\n\nWhat it is: CVE-2026-44041 is a medium-severity memory corruption vulnerability in uvnc UltraVNC, published on 1 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-44041 in the wild and no public exploit code.\n\nAffected product: uvnc UltraVNC. 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-2026-44041/ (Markdown: https://insights.sbomify.com/CVE-2026-44041/index.md)","id":"CVE-2026-44041","markdown":"https://insights.sbomify.com/CVE-2026-44041/index.md","name":"CVE-2026-44041","record":{"aliases":["GHSA-f9fh-23qv-g394"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"VNC remote control","requires_auth":"low_privilege","summary":"An out-of-bounds read in UltraVNC's string conversion helper can leak memory or crash the application if a non-terminated wide string is processed.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"securin","cpe":[{"product":"ultravnc","vendor":"uvnc"}],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"UltraVNC through 1.8.2.2 contains an out-of-bounds read in the wide-string to multibyte conversion helper. In rfb/dh.cpp:204, the vncWc2Mb() function passes a caller-supplied WCHAR pointer to wcslen() before any bounds check. If the caller provides a wide-character buffer that is not properly NUL-terminated, wcslen() reads past the end of the buffer until it encounters a NUL wchar, resulting in an out-of-bounds read. Under typical Win32 API usage this requires an abnormal caller contract. Impact is limited to a potential information disclosure from adjacent memory regions or a process crash (denial of service) if the over-read crosses a page boundary.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"UltraVNC vncWc2Mb calls wcslen() before validating that the wide string is NUL-terminated","id":"CVE-2026-44041","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":"UltraVNC repeater wi_uudecode off-by-one in base64 decode boundary check","id":"CVE-2026-44042"},"packages":[],"prev":{"headline":"UltraVNC vncauth.c uses time-seeded libc rand() to generate VNC authentication challenge bytes","id":"CVE-2026-44040"},"products":["UltraVNC"],"published":"2026-07-01","related":[{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8264","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8265","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8266","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2019-8280","kev_date_added":null,"published":"2019-03-09"},{"cvss_score":9.8,"headline":"Memory corruption in UltraVNC","id":"CVE-2018-15361","kev_date_added":null,"published":"2019-03-05"},{"cvss_score":9.8,"headline":"Integer overflow in UltraVNC","id":"CVE-2019-8260","kev_date_added":null,"published":"2019-03-05"},{"cvss_score":9.8,"headline":"Integer overflow in UltraVNC","id":"CVE-2019-8261","kev_date_added":null,"published":"2019-03-05"}],"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":"2026-07-09","vendors":["uvnc"]},"summary":"An out-of-bounds read in UltraVNC's string conversion helper can leak memory or crash the application if a non-terminated wide string is processed.","url":"https://insights.sbomify.com/CVE-2026-44041/"}