Vulnerability · Published Oct 15, 2026 · Assigned by VulnCheck
CVE-2026-111162WildMIDI through 0.5.0 Heap Out-of-Bounds Read via _WM_ParseNewHmp
Medium 6.1
In plain English
A medium-severity out-of-bounds read in WildMIDI from Mindwerks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)6.1Medium
Exploit odds (30 days)0.1%top 97.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wildmidi | no fix listed | DEBIAN-CVE-2026-111162 |
| Debian:13 | wildmidi | no fix listed | DEBIAN-CVE-2026-111162 |
| Debian:14 | wildmidi | no fix listed | DEBIAN-CVE-2026-111162 |
| Ubuntu:22.04:LTS | wildmidi | no fix listed | UBUNTU-CVE-2026-111162 |
| Ubuntu:24.04:LTS | wildmidi | no fix listed | UBUNTU-CVE-2026-111162 |
| Ubuntu:26.04:LTS | wildmidi | no fix listed | UBUNTU-CVE-2026-111162 |
| Ubuntu:26.10 | wildmidi | no fix listed | UBUNTU-CVE-2026-111162 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
References
- https://hackmd.io/@haind-pwn/wildmidi-hmp-chunk-length-underflow-oob-read technical-description
- https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/f_hmp.c#L258-L261 technical-description
- https://github.com/Mindwerks/wildmidi/blob/340472ed4633d139d30c660b90eca03c1320e593/src/internal_midi.c#L2166-L2172 technical-description
- https://github.com/Mindwerks/wildmidi product
- VulnCheck Advisory: WildMIDI through 0.5.0 Heap Out-of-Bounds Read via _WM_ParseNewHmp third-party-advisory