{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34734 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-34734 is a high-severity use after free vulnerability in Hdfgroup Hdf5, published on 9 Apr 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-2026-34734 and fix it if it is affected.\n\nWhat it is: CVE-2026-34734 is a high-severity use after free vulnerability in Hdfgroup Hdf5, published on 9 Apr 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34734 exists.\n\nAffected product: Hdfgroup Hdf5. 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-2026-34734/ (Markdown: https://insights.sbomify.com/CVE-2026-34734/index.md)","id":"CVE-2026-34734","markdown":"https://insights.sbomify.com/CVE-2026-34734/index.md","name":"CVE-2026-34734","record":{"aliases":["DEBIAN-CVE-2026-34734","ECHO-4587-2d95-fba0","GHSA-w7v2-9cmr-pwwj","JLSEC-2026-354","UBUNTU-CVE-2026-34734"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"HDF5 data library","requires_auth":"none","summary":"An attacker can trigger a heap use-after-free in the h5dump utility by supplying a malicious HDF5 file, potentially leading to code execution or crashes.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"hdf5","vendor":"hdfgroup"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-825","name":"Expired Pointer Dereference"},{"id":"CWE-416","name":"Use After Free"}],"description":"HDF5 is software for managing data. In 1.14.1-2 and earlier, a heap-use-after-free was found in the h5dump helper utility. An attacker who can supply a malicious h5 file can trigger a heap use-after-free. The freed object is referenced in a memmove call from H5T__conv_struct. The original object was allocated by H5D__typeinfo_init_phase3 and freed by H5D__typeinfo_term.","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":"HDF5: H5T__conv_struct Use After Free","id":"CVE-2026-34734","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"hdfgroup:hdf5","products":["hdfgroup:hdf5"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Hytale Modding Vulnerable to Remote Code Execution via File Upload Bypass in `FileController`","id":"CVE-2026-34735"},"packages":[],"prev":{"headline":"AVideo: Unauthenticated File Deletion via PHP Operator Precedence Bug in CLI Guard","id":"CVE-2026-34733"},"products":["hdf5"],"published":"2026-04-09","related":[{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-32608","kev_date_added":null,"published":"2024-10-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-29157","kev_date_added":null,"published":"2024-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-29159","kev_date_added":null,"published":"2024-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-29164","kev_date_added":null,"published":"2024-05-09"},{"cvss_score":9.8,"headline":"Other in n/a","id":"CVE-2024-32611","kev_date_added":null,"published":"2024-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-32615","kev_date_added":null,"published":"2024-05-09"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2024-32621","kev_date_added":null,"published":"2024-05-09"}],"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":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["HDFGroup"]},"summary":"An attacker can trigger a heap use-after-free in the h5dump utility by supplying a malicious HDF5 file, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-34734/"}