CVE-2026-118263
Echo: BodyDump can discard BodyLimit overflow errors for unknown-length requests
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.
Fixes and workarounds
Fix
github.com/labstack/echo/v5 (Go): OSV reports a fixed version 5.4.1. Check the advisory for supported release branches.
Source: OSV GHSA-x9ff-22gv-65f4Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| echo labstack |
>= 5.0.0, < 5.4.1 (affected) | CNA: GitHub_M |
github.com/labstack/echo/v5github.com/labstack/echo/v5
Go |
≥ 5.0.0; < 5.4.1 (affected, semver); OSV events: introduced 5.0.0; fixed 5.4.1Source events (semver)Other versions: unaffected |
OSV GHSA-x9ff-22gv-65f4 |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | CNA: GitHub_M |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/labstack/echo/security/advisories/GHSA-x9ff-22gv-65f4CNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/labstack/echo/pull/3105CNA: GitHub_M · x_refsource_MISC
- https://github.com/labstack/echo/commit/1855061e572ae9dab727c811d8382f266bfbaaecCNA: GitHub_M · x_refsource_MISC
- https://github.com/labstack/echo/releases/tag/v5.4.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/advisories/GHSA-x9ff-22gv-65f4OSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-x9ff-22gv-65f4OSV / GitHub Security Advisories · osv
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