SCA: security update for github.com/lin-snow/ech0 (GHSA-wc4h-2348-jc3p)

high Tenable Self-Hosted Container Security Plugin ID 439733

Description

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

- Ech0 is an open-source, self-hosted publishing platform for personal idea sharing. Prior to 4.2.8, Ech0
implements link preview (editor fetches a page title) through GET /api/website/title. That is legitimate
product behavior, but the implementation is unsafe: the route is unauthenticated, accepts a fully
attacker-controlled URL, performs a server-side GET, reads the entire response body into memory
(io.ReadAll). There is no host allowlist, no SSRF filter, and InsecureSkipVerify: true on the outbound
client. Anyone who can reach the instance can force the Ech0 server to open HTTP/HTTPS URLs of their
choice as seen from the server’s network position (Docker bridge, VPC, localhost from the process view).
This vulnerability is fixed in 4.2.8. (CVE-2026-35036)

Solution

Update the github.com/lin-snow/ech0 library and its related packages to version 1.4.8-0.20260401031029-4ca56fea5ba4 or later.

Plugin Details

Severity: High

ID: 439733

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/3/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.74

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-35036

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/3/2026

Vulnerability Publication Date: 4/3/2026

Reference Information

CVE: CVE-2026-35036

cwe: CWE-918

Detections

Analytics