{"answers":{"affected":"1 open source package ship an affected version, including matio.","exploited":"There is no known exploitation of OSV-2026-721 in the wild and no public exploit code.","fix":"No fix has been published for OSV-2026-721 yet. Limit exposure of the affected software until one is available.","what":"OSV-2026-721 is a memory corruption vulnerability in matio, published on 13 May 2026."},"fix_prompt":"Check this codebase for OSV-2026-721 and fix it if it is affected.\n\nWhat it is: OSV-2026-721 is a memory corruption vulnerability in matio, published on 13 May 2026. \nExploitation: There is no known exploitation of OSV-2026-721 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- matio (OSS-Fuzz): affected all versions; no fix listed\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/OSV-2026-721/ (Markdown: https://insights.sbomify.com/OSV-2026-721/index.md)","id":"OSV-2026-721","markdown":"https://insights.sbomify.com/OSV-2026-721/index.md","name":"OSV-2026-721","record":{"aliases":[],"analysis":{"component_type":"library","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"unknown","non_default_config":false,"product_category":"HDF5 library","requires_auth":"none","summary":"A heap-buffer-overflow in the HDF5 library allows attackers to cause denial of service or potentially execute code via crafted files.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=512001847\n\n```\nCrash type: Heap-buffer-overflow WRITE {*}\nCrash state:\nH5D__scatter_mem\nH5D__scatgath_read\nH5D__contig_read\n```","ecosystems":["OSS-Fuzz"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Heap-buffer-overflow in H5D__scatter_mem","id":"OSV-2026-721","indexable":true,"kev":null,"kind":"advisory","links":{"ecosystem":"OSS-Fuzz","product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"OSS-Fuzz","fixed":[],"introduced":[],"last_affected":[],"package":"matio","purl":"pkg:generic/matio","source":"OSV-2026-721"}],"products":null,"published":"2026-05-13","related":[],"sources":[{"class":"attribution","licence":"CC BY 4.0","name":"OSS-Fuzz","prefix":"OSV"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":"A heap-buffer-overflow in the HDF5 library allows attackers to cause denial of service or potentially execute code via crafted files.","url":"https://insights.sbomify.com/OSV-2026-721/"}