Detections
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SCA: security update for github.com/labstack/echo/v4, github.com/labstack/echo/v5 (GHSA-cxf3-9h37-7rr8)

critical Tenable Self-Hosted Container Security Plugin ID 477257

Description

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

 - Echo is a Go web framework. From 4.0.0 until 4.16.1 and 5.4.1, Echo's Proxy middleware selects a raw
 tunnel from a client WebSocket upgrade request before verifying that the configured upstream accepted the
 upgrade. If the upstream rejects the upgrade with an ordinary keep-alive response, later HTTP requests on
 the connection are sent directly to that upstream without passing through Echo's router or route-specific
 middleware. This can bypass authentication or authorization enforced only by Echo routes, but requires an
 accessible proxy route, a cooperating rejected-upgrade response, and a target without independent upstream
 authorization. This issue is fixed in 4.16.1 and 5.4.1. (CVE-2026-118264)

Solution

Update the github.com/labstack/echo/v4 library and its related packages to version 4.16.1 or later.

See Also

https://github.com/advisories/GHSA-cxf3-9h37-7rr8

Plugin Details

Severity: Critical

ID: 477257

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 10/24/2026

Updated: 10/29/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.55

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2026-118264

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.1

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/23/2026

Vulnerability Publication Date: 10/23/2026

Reference Information

CVE: CVE-2026-118264