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SCA: security update for fast-jwt (GHSA-8wpc-h4q6-8fxv)

high Tenable Self-Hosted Container Security Plugin ID 473941

Description

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

 - fast-jwt provides fast JSON Web Token (JWT) implementation. Prior to 6.3.1, fast-jwt createVerifier
 accepts an unsigned JWT when key is an empty string or null and algorithms is a non-empty allowlist. Falsy
 synchronous keys bypass prepareKeyOrSecret, allowedAlgorithms remains active, hasKey is false, and the
 empty signature avoids the verifySignature gate. An attacker can therefore submit a token containing
 arbitrary claims without possessing a signing key, resulting in authentication or authorization bypass.
 Claim validators still run, and non-empty keys, an empty key without algorithms, and the async key
 resolver path do not have this behavior. This issue is fixed in version 6.3.1. (CVE-2026-107720)

Solution

Update the fast-jwt library and its related packages to version 6.3.1 or later.

See Also

https://github.com/advisories/GHSA-8wpc-h4q6-8fxv

Plugin Details

Severity: High

ID: 473941

Version: Revision 1.1

Type: Local

Family: SCA Checks

Published: 10/9/2026

Updated: 10/9/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.46

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-107720

CVSS v3

Risk Factor: High

Base Score: 7.4

Temporal Score: 6.4

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/8/2026

Vulnerability Publication Date: 10/8/2026

Reference Information

CVE: CVE-2026-107720