Answer in brief
CVE-2026-118263 records a Medium severity (CVSS 6.3) vulnerability in Echo: BodyDump can discard BodyLimit overflow errors for unknown-length requests. The current sources do not mark it as known exploited. The current feed maps labstack/echo (generic), github.com/labstack/echo/v5 (go), github.com/labstack/echo/v5 (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps labstack/echo (generic), github.com/labstack/echo/v5 (go), github.com/labstack/echo/v5 (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| labstack/echogeneric | >=5.0.0 <5.4.1 | 5.4.1 |
| github.com/labstack/echo/v5go | >=5.0.0,<5.4.1 | 5.4.1 |
| github.com/labstack/echo/v5go | >=5.0.0 <5.4.1 | 5.4.1 |
Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 23, 2026
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.
Quoted source text, attributed separately from HOL analysis.