{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-121743 in the wild and no public exploit code.","exposure":"An affected version is exposed as installed. No special setting or call is needed.","fix":"No fix has been published for CVE-2026-121743 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-121743 is a high-severity memory corruption vulnerability in Ashlar-Vellum Cobalt, published on 12 Nov 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-121743 and fix it if it is affected.\n\nWhat it is: CVE-2026-121743 is a high-severity memory corruption vulnerability in Ashlar-Vellum Cobalt, published on 12 Nov 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-121743 in the wild and no public exploit code.\nExposure: An affected version is exposed as installed. No special setting or call is needed.\n\nAffected product: Ashlar-Vellum Cobalt. 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-2026-121743/ (Markdown: https://insights.sbomify.com/CVE-2026-121743/index.md)","id":"CVE-2026-121743","markdown":"https://insights.sbomify.com/CVE-2026-121743/index.md","name":"CVE-2026-121743","record":{"aliases":["GHSA-jqr4-cgc2-3v65"],"analysis":{"component_type":"desktop_application","exploitable_when_present":false,"fix_type":"no_fix_stated","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"CAD software","requires_auth":"none","requires_specific_call":false,"summary":"A malicious AR file opened in Ashlar-Vellum Cobalt can overflow a heap buffer and execute code; Cobalt users should care.","user_interaction":"required","vuln_class":"memory_corruption","vulnerable_functions":[]},"analysis_generated_by":"sbomify/insights-2b-fp8","assigner":"zdi","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.0"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"Ashlar-Vellum Cobalt AR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Ashlar-Vellum Cobalt. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of AR files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28675.","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":"Ashlar-Vellum Cobalt AR File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2026-121743","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Ashlar-Vellum Cobalt XE File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability","id":"CVE-2026-121744"},"nickname":null,"packages":[],"prev":{"headline":"Ashlar-Vellum Cobalt XE File Parsing Use-After-Free Remote Code Execution Vulnerability","id":"CVE-2026-121742"},"products":["Cobalt"],"published":"2026-11-12","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-11-12","vendors":["Ashlar-Vellum"]},"summary":"A malicious AR file opened in Ashlar-Vellum Cobalt can overflow a heap buffer and execute code; Cobalt users should care.","url":"https://insights.sbomify.com/CVE-2026-121743/"}