Detections
Analytics
SCA: security update for fast-jwt (GHSA-gm45-q3v2-6cf8)
medium Tenable Cloud Security Plugin ID 421153
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 5.0.6, the fast-jwt library does not
properly validate the iss claim based on the RFC 7519. The iss (issuer) claim validation within the fast-
jwt library permits an array of strings as a valid iss value. This design flaw enables a potential attack
where a malicious actor crafts a JWT with an iss claim structured as ['https://attacker-domain/',
'https://valid-iss']. Due to the permissive validation, the JWT will be deemed valid. Furthermore, if the
application relies on external libraries like get-jwks that do not independently validate the iss claim,
the attacker can leverage this vulnerability to forge a JWT that will be accepted by the victim
application. Essentially, the attacker can insert their own domain into the iss array, alongside the
legitimate issuer, and bypass the intended security checks. This issue is fixed in 5.0.6. (CVE-2025-30144)
See Also
Plugin Details
Severity: Medium
ID: 421153
Version: Revision 1.14
Type: Local
Family: SCA Checks
Published: 3/20/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3.5
Percentile: 52.04
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 6.1
Temporal Score: 4.5
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:C/A:N
CVSS Score Source: CVE-2025-30144
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/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: 3/19/2025
Vulnerability Publication Date: 3/19/2025
Reference Information
CVE: CVE-2025-30144
cwe: CWE-290