Answer in brief
CVE-2026-118650 records a High severity (CVSS 7.5) vulnerability in Echo: middleware.Static: `%2F`-encoded path bypasses route/group middleware guarding a statically-served path. The current sources do not mark it as known exploited. The current feed maps labstack/echo (generic), github.com/labstack/echo/v4 (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 7.5. 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/v4 (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 <5.4.0 || <4.16.0 | 4.16.0, 5.4.0 |
| github.com/labstack/echo/v4go | <4.16.0 | 4.16.0 |
| github.com/labstack/echo/v5go | <5.4.0 | 5.4.0 |
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 28, 2026
Echo is a Go web framework. Prior to 4.16.0 and 5.4.0, a globally mounted middleware.Static instance can interpret an encoded request path differently from Echo's router because the router matches the still-encoded path while the static handler uses the decoded URL.Path. The advisory demonstrates an encoded slash resolving to a file under the static root through the global static middleware, but the source is internally inconsistent about whether a route or group guard protects the corresponding literal path in that global-mount configuration. This issue is fixed in 4.16.0 and 5.4.0.
Quoted source text, attributed separately from HOL analysis.