{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-61720 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-61720 is a medium-severity 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-2026-61720 and fix it if it is affected.\n\nWhat it is: CVE-2026-61720 is a medium-severity 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-2026-61720 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-2026-61720/ (Markdown: https://insights.sbomify.com/CVE-2026-61720/index.md)","id":"CVE-2026-61720","markdown":"https://insights.sbomify.com/CVE-2026-61720/index.md","name":"CVE-2026-61720","record":{"aliases":["DEBIAN-CVE-2026-61720","GHSA-rmc4-c8hw-455w","UBUNTU-CVE-2026-61720"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"SoundFont synthesizer library","requires_auth":"none","summary":"A crafted SoundFont file triggers an unsigned integer underflow in FluidSynth, causing excessive memory allocation and denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"FluidSynth is a software synthesizer based on the SoundFont 2 specifications. From 2.5.0 until 2.5.6, the SF2 parser computes the DMOD modulator count as chunk.size / SF_MOD_SIZE - 1 without rejecting chunks smaller than one record. A crafted SF2 file containing a zero-sized DMOD chunk makes the unsigned subtraction wrap to UINT_MAX, and the parser then attempts billions of SFMod allocations. This exhausts process memory and causes denial of service. No workaround is available. 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: SF2 DMOD Chunk Unsigned Underflow","id":"CVE-2026-61720","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"FluidSynth: Heap-based buffer overrun for DLS samples","id":"CVE-2026-61721"},"packages":[],"prev":{"headline":"WeGIA: Stored Cross-Site Scripting (XSS) in \"historico_prontuarios.php\" via \"textoProntuario\" Field","id":"CVE-2026-61719"},"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":"2026-09-21","vendors":["FluidSynth"]},"summary":"A crafted SoundFont file triggers an unsigned integer underflow in FluidSynth, causing excessive memory allocation and denial of service.","url":"https://insights.sbomify.com/CVE-2026-61720/"}