OCTOBER 11, 2026
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Case File

CVE-2026-61721

HIGH · CVSS 8 EPSS 0.19% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-18 · Last synced 2026-10-11

CyberRota Analysis

AI-Generated

FluidSynth versions 2.5.0 to 2.5.6 are vulnerable due to improper handling of loop points in DLS files, which can lead to out-of-bounds reads, resulting in undefined behavior, potential memory disclosure, and denial of service. Users and organizations utilizing FluidSynth for audio rendering, especially those with enabled native DLS support, should prioritize upgrading to version 2.5.6 to mitigate these risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-61721
Severity
HIGH
CVSS
8
EPSS
0.19%

Original NVD 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.