{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32853 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-32853 is a medium-severity vulnerability in LibVNCServer, published on 24 Mar 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-2026-32853 and fix it if it is affected.\n\nWhat it is: CVE-2026-32853 is a medium-severity vulnerability in LibVNCServer, published on 24 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-32853 exists.\n\nAffected product: LibVNCServer. 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-2026-32853/ (Markdown: https://insights.sbomify.com/CVE-2026-32853/index.md)","id":"CVE-2026-32853","markdown":"https://insights.sbomify.com/CVE-2026-32853/index.md","name":"CVE-2026-32853","record":{"aliases":["DEBIAN-CVE-2026-32853","GHSA-87q7-v983-qwcj","UBUNTU-CVE-2026-32853"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"VNC server library","requires_auth":"none","summary":"A malicious VNC server can trigger a heap out-of-bounds read in LibVNCServer, leading to information disclosure or application crashes.","user_interaction":"not_required","vuln_class":"information_disclosure"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[{"product":"libvncserver","vendor":"libvncserver_project"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"LibVNCServer versions 0.9.15 and prior (fixed in commit 009008e) contain a heap out-of-bounds read vulnerability in the UltraZip encoding handler that allows a malicious VNC server to cause information disclosure or application crash. Attackers can exploit improper bounds checking in the HandleUltraZipBPP() function by manipulating subrectangle header counts to read beyond the allocated heap buffer.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"LibVNCServer UltraZip Encoding Heap Out-of-bounds Read","id":"CVE-2026-32853","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"information_disclosure","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"LibVNCServer httpd proxy NULL Pointer Dereference","id":"CVE-2026-32854"},"packages":[],"prev":{"headline":"MailEnable \u003c 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter","id":"CVE-2026-32852"},"products":["LibVNCServer"],"published":"2026-03-24","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2016-9941","kev_date_added":null,"published":"2016-12-31"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2016-9942","kev_date_added":null,"published":"2016-12-31"},{"cvss_score":6.3,"headline":"LibVNCServer httpd proxy NULL Pointer Dereference","id":"CVE-2026-32854","kev_date_added":null,"published":"2026-03-24"}],"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-14","vendors":["LibVNC"]},"summary":"A malicious VNC server can trigger a heap out-of-bounds read in LibVNCServer, leading to information disclosure or application crashes.","url":"https://insights.sbomify.com/CVE-2026-32853/"}