## Echo: Decompress permits unbounded gzip expansion in v4

- 種別: advisory
- 重大度: high
- 関連技術: go, github
- 公開日時: 2026-10-23T20:49:49.000Z
- 情報源: GitHub Advisory Database (https://github.com/advisories/GHSA-h7wr-284f-5qvc)
- パーマリンク: https://vulnpulse.app/items/ghsa-ghsa-h7wr-284f-5qvc

影響: go:github.com/labstack/echo/v4 >= 4.0.0, < 4.16.1 → 4.16.1
Echo v4's opt-in Decompress middleware exposed a gzip-decoded request stream without limiting its expanded size. A small compressed request could therefore produce a very large decoded body. Handlers that read or bind that body could consume excessive memory or CPU, and repeated or concurrent requests could cause denial of service. The middleware is not enabled by default. A limit on the compressed request size alone does not bound the decompressed size. Applications that already apply an effec…