Vulnerability Description
Echo is a Go web framework. From 4.0.0 until 4.16.1, Echo v4's opt-in Decompress middleware exposes a gzip-decoded request stream without limiting its expanded size. A small compressed request can expand into a very large body when a handler reads or binds it, consuming excessive memory or CPU and allowing repeated or concurrent requests to cause denial of service. The middleware is not enabled by default, and limiting only the compressed request size does not bound the decoded size. This issue is fixed in 4.16.1.
Related Weaknesses (CWE)
References
- https://github.com/labstack/echo/commit/3fb0ba7e17645bb65611e2a08875d0a2f65c421f
- https://github.com/labstack/echo/releases/tag/v4.16.1
- https://github.com/labstack/echo/security/advisories/GHSA-h7wr-284f-5qvc
FAQ
What is CVE-2026-118261?
CVE-2026-118261 is a documented vulnerability. Echo is a Go web framework. From 4.0.0 until 4.16.1, Echo v4's opt-in Decompress middleware exposes a gzip-decoded request stream without limiting its expanded size. A small compressed request can exp...
How severe is CVE-2026-118261?
CVSS scoring is not yet available for CVE-2026-118261. Check NVD for updates.
Is there a patch for CVE-2026-118261?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.