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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-118265)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-118265)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
477899	Chainguard: gotenberg: security update to 8.38.1-r2	Tenable Cloud Security	Chainguard Local Security Checks	Local	medium
477899	Chainguard: gotenberg: security update to 8.38.1-r2	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	Local	medium
373854	Linux Distros Unpatched Vulnerability : CVE-2026-118265	Nessus	Misc.	Local	medium
477254	SCA: security update for github.com/labstack/echo/v5 (GHSA-h53f-rm2w-w7rg)	Tenable Cloud Security	SCA Checks	Local	medium
477254	SCA: security update for github.com/labstack/echo/v5 (GHSA-h53f-rm2w-w7rg)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-118265

medium

Tenable Plugins

medium

medium

medium

medium

medium