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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-252"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/118xxx/CVE-2026-118263.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.4.1"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "1855061e572ae9dab727c811d8382f266bfbaaec"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v5.4.1",
"range": [
{
"fixed": "a6a9673a54d2c719ceb32ce6a929d35483acfb2b"
}
],
"source": "REFERENCES_TAG"
}
]
}