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SCA: security update for fast-jwt (GHSA-5hjw-83fp-phq9)

high Tenable Self-Hosted Container Security Plugin ID 473955

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 6.3.0, fast-jwt createVerifier
 accepts a validly signed JWT whose payload is a JSON array because src/decoder.js checks that the payload
 is an object but does not reject arrays. The claim validator loop then finds no named exp, nbf, iss, aud,
 sub, jti, or nonce properties and silently skips those configured checks, returning the array as a
 successfully verified payload. An attacker who can produce or influence a validly signed token may bypass
 expiry, issuer, audience, subject, revocation, and replay protections. The opt-in requiredClaims option
 can block missing claims, and signature verification itself is not bypassed. This issue is fixed in
 version 6.3.0. (CVE-2026-107723)

Solution

Update the fast-jwt library and its related packages to version 6.3.0 or later.

See Also

https://github.com/advisories/GHSA-5hjw-83fp-phq9

Plugin Details

Severity: High

ID: 473955

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: 8.5

Temporal Score: 6.3

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

CVSS Score Source: CVE-2026-107723

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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-2026-107723