{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19023 exists.","fix":"Upgrade to a fixed version.","what":"CVE-2026-19023 is a medium-severity vulnerability in The HDF Group HDF5, published on 5 Aug 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-2026-19023 and fix it if it is affected.\n\nWhat it is: CVE-2026-19023 is a medium-severity vulnerability in The HDF Group HDF5, published on 5 Aug 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-2026-19023 exists.\n\nAffected product: The HDF Group 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-2026-19023/ (Markdown: https://insights.sbomify.com/CVE-2026-19023/index.md)","id":"CVE-2026-19023","markdown":"https://insights.sbomify.com/CVE-2026-19023/index.md","name":"CVE-2026-19023","record":{"aliases":["AZL-94493","DEBIAN-CVE-2026-19023","ECHO-664c-66c9-a47c","GHSA-w2vw-9w6r-w7mm","UBUNTU-CVE-2026-19023"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"HDF5 library","requires_auth":"none","summary":"Attackers can cause denial of service in HDF5 h5dump by providing a crafted variable-length string dataset that triggers a pointer dereference error.","user_interaction":"required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"HDFG","cpe":[],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-822","name":"Untrusted Pointer Dereference"}],"description":"Untrusted pointer dereference in the render_bin_output function in the h5dump tool in HDF5 before 2.3.0 allows attackers to cause a denial of service via a variable-length string dataset with more than one element dumped in binary mode, which corrupts the per-element stride calculation and causes subsequent elements to be read from a misaligned offset and dereferenced as a pointer.","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 h5dump Untrusted Pointer Dereference in Binary Output of Variable-Length String Datasets","id":"CVE-2026-19023","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"HDF5 H5Pget_fill_value NULL Pointer Dereference via Malformed Fill Value Message","id":"CVE-2026-19024"},"packages":[],"prev":{"headline":"OpenHands send_pull_request.py initialize_repo command injection","id":"CVE-2026-19022"},"products":["HDF5"],"published":"2026-08-05","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":"2026-08-06","vendors":["The HDF Group"]},"summary":"Attackers can cause denial of service in HDF5 h5dump by providing a crafted variable-length string dataset that triggers a pointer dereference error.","url":"https://insights.sbomify.com/CVE-2026-19023/"}