## undici vulnerable to Denial of Service via unbounded memory in the EventSource parser

- 種別: advisory
- 重大度: medium
- 関連技術: nodejs
- CVE: CVE-2026-109924
- 公開日時: 2026-10-23T22:13:29.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-4qv8-2p9j-2685)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-4qv8-2p9j-2685

影響: npm:undici >= 6.5.0, < 6.29.1 → 6.29.1, npm:undici >= 7.0.0, < 7.30.1 → 7.30.1, npm:undici >= 8.0.0, < 8.12.2 → 8.12.2
undici's EventSource client can be driven to exhaust process memory by a malicious or compromised Server-Sent Events peer. By sending millions of tiny completed data: fields with no blank event separator, or a single unfinished line split across many chunks, the parser retains a growing amount of per-field and per-chunk state. The byte-based maxEventSize and maxResponseSize limits do not bound that retained state, and maxResponseSize is enforced on the compressed body before decompression, so a…