Vulnerability Description
Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's BodyDump middleware can discard a BodyLimit overflow error for an unknown-length request when BodyDump's capture limit is below the BodyLimit threshold. BodyDump drains the remaining body while ignoring read errors and replaces it with the captured prefix, so an HTTP/1.1 chunked request can be truncated and processed successfully even though the original body exceeded the configured limit. Known-length requests rejected before BodyDump runs are unaffected, and the issue does not establish a general authentication bypass or denial of service. This issue is fixed in 5.4.1.
Related Weaknesses (CWE)
References
- https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaec
- https://github.com/labstack/echo/pull/3105
- https://github.com/labstack/echo/releases/tag/v5.4.1
- https://github.com/labstack/echo/security/advisories/GHSA-x9ff-22gv-65f4
FAQ
What is CVE-2026-118263?
CVE-2026-118263 is a documented vulnerability. Echo is a Go web framework. From 5.0.0 until 5.4.1, Echo v5's BodyDump middleware can discard a BodyLimit overflow error for an unknown-length request when BodyDump's capture limit is below the BodyLi...
How severe is CVE-2026-118263?
CVSS scoring is not yet available for CVE-2026-118263. Check NVD for updates.
Is there a patch for CVE-2026-118263?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.