Answer in brief
CVE-2026-118265 records a Medium severity (CVSS 5.3) vulnerability in Echo: X-Real-IP extractor trusts the header value instead of the sending peer. 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 5.3. 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 ExtractIPFromRealIPHeader validates whether the client-supplied X-Real-IP value belongs to a trusted range instead of validating the direct network peer. A client reaching Echo directly, or through a proxy that preserves the header, can supply a loopback or private address and have Context.RealIP return that spoofed identity. Applications using the extractor for IP allowlists, rate limiting, audit logs, or forwarding headers can consequently trust an attacker-controlled address; the default direct extractor and Echo v4 are unaffected. This issue is fixed in 5.4.1.
Quoted source text, attributed separately from HOL analysis.