{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-61721 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-61721 is a high-severity memory corruption vulnerability in fluidsynth, published on 18 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-61721 and fix it if it is affected.\n\nWhat it is: CVE-2026-61721 is a high-severity memory corruption vulnerability in fluidsynth, published on 18 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-61721 in the wild and no public exploit code.\n\nAffected product: fluidsynth. 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-2026-61721/ (Markdown: https://insights.sbomify.com/CVE-2026-61721/index.md)","id":"CVE-2026-61721","markdown":"https://insights.sbomify.com/CVE-2026-61721/index.md","name":"CVE-2026-61721","record":{"aliases":["DEBIAN-CVE-2026-61721","GHSA-59ph-rx8r-8p4j"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_read","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Audio synthesis library","requires_auth":"none","summary":"A crafted DLS file can cause out-of-bounds reads in FluidSynth, leading to memory disclosure or denial of service.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the native DLS loader assigns file-controlled wsmp.loop_start and wsmp.loop_length values to samples without calling fluid_sample_validate() or fluid_sample_sanitize_loop(). A crafted DLS file can place sample loop points beyond the sample buffer, causing out-of-bounds reads during audio rendering, undefined behavior, possible memory disclosure, and denial of service. Builds compiled with the CMake option enable-native-dls set to OFF do not expose the affected parser. This issue is fixed in version 2.5.6.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"FluidSynth: Heap-based buffer overrun for DLS samples","id":"CVE-2026-61721","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"FluidSynth: DLS Articulation Chunk Integer Overflow","id":"CVE-2026-61722"},"packages":[],"prev":{"headline":"FluidSynth: SF2 DMOD Chunk Unsigned Underflow","id":"CVE-2026-61720"},"products":["fluidsynth"],"published":"2026-09-18","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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-18","vendors":["FluidSynth"]},"summary":"A crafted DLS file can cause out-of-bounds reads in FluidSynth, leading to memory disclosure or denial of service.","url":"https://insights.sbomify.com/CVE-2026-61721/"}