Out-of-bounds Read in Mindwerks Wildmidi
CVE-2026-111162
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().
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind-pwn/wildmidi-hmp-chunk-length-underflow-oob-read (technical-description)
- github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src… (technical-description)
- github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src… (technical-description)
- github.com/Mindwerks/wildmidi (product)
- www.vulncheck.com/advisories/wildmidi-through-0.5.0-heap-out-of-bounds-read-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111162?
- CVE-2026-111162 is a medium-severity vulnerability in Mindwerks Wildmidi, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-10-15.
- How severe is CVE-2026-111162?
- Medium severity. CVSS v3 base score is 6.1 out of 10.