CVE-2026-58264 FluidSynth - Buffer Overflow

FluidSynth 1.1.2 to 2.5.6 contains a buffer overflow caused by lack of bounds checking on the pitch_bend_range command channel argument in the command handler, letting remote or local attackers cause denial of service or execute code, exploit requires use of TCP server or command shell.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.59% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-122

Vendor fix

Update to version 2.5.6 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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