What’s Vulnerable › Vulnerabilities

CVE-2026-111162: WildMIDI through 0.5.0 Heap Out-of-Bounds Read via _WM_ParseNewHmp

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-15 · updated 2026-10-16
• Weakness: CWE-125

Description

WildMIDI through 0.5.0 contains a heap out-of-bounds read vulnerability in the HMP parser _WM_ParseNewHmp() that allows attackers to read beyond buffers via underflowed chunk lengths. Attackers can supply a crafted .hmp file with a chunk length of 0-12 that wraps to roughly 4 GB, crashing applications or exposing heap bytes through WildMidi_GetInfo().

Affected products

• Mindwerks WildMIDI: through 0.5.0

References

• https://github.com/Mindwerks/wildmidi
• https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/f_hmp.c#L258-L261
• https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/internal_midi.c#L2166-L2172
• https://hackmd.io/@haind-pwn/wildmidi-hmp-chunk-length-underflow-oob-read
• https://www.vulncheck.com/advisories/wildmidi-through-0.5.0-heap-out-of-bounds-read-via-wm-parsenewhmp

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