Detections
Analytics

SCA: security update for pyjwt (GHSA-r9jw-mwhq-wp62)

high Tenable Cloud Security Plugin ID 418632

Description

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

 - In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for
 all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is
 prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables
 symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which
 would allow an attacker to craft JWTs from scratch. (CVE-2017-11424)

See Also

https://github.com/advisories/GHSA-r9jw-mwhq-wp62

Plugin Details

Severity: High

ID: 418632

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.18

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2017-11424

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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: 5/13/2022

Vulnerability Publication Date: 8/24/2017

Reference Information

CVE: CVE-2017-11424