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SCA: security update for @fastify/express (GHSA-6hw5-45gm-fj88)

critical Tenable Self-Hosted Container Security Plugin ID 440476

Description

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

 - Impact@fastify/express v4.0.4 and earlier fails to normalize URLs before passing them to Express
 middleware when Fastify router normalization options are enabled. This allows complete bypass of path-
 scoped authentication middleware via duplicate slashes when ignoreDuplicateSlashes is enabled, or via
 semicolon delimiters when useSemicolonDelimiter is enabled. In both cases, Fastify router normalizes the
 URL and matches the route, but @fastify/express passes the original un-normalized URL to Express
 middleware, which fails to match and is skipped. An unauthenticated attacker can access protected routes
 by manipulating the URL path. PatchesUpgrade to @fastify/express v4.0.5 or later. (CVE-2026-33808)

Solution

Update the @fastify/express library and its related packages to version 4.0.5 or later.

See Also

https://github.com/advisories/GHSA-6hw5-45gm-fj88

Plugin Details

Severity: Critical

ID: 440476

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/16/2026

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.61

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-33808

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.1

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:P

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 Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/16/2026

Vulnerability Publication Date: 4/15/2026

Reference Information

CVE: CVE-2026-33808

cwe: CWE-436