Detections
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Echo: pyjwt: security update to 2.13.0-1

medium Tenable Self-Hosted Container Security Plugin ID 458729

Description

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

 - PyJWT is a JSON Web Token implementation in Python. From 2.9.0 to 2.12.1, there is a verifier-side
 algorithm allow-list bypass when jwt.decode() or jwt.decode_complete() are called with a PyJWK key. The
 token header alg is checked against the caller-supplied algorithms allow-list, but signature verification
 is performed with the algorithm bound to the PyJWK object instead of the header algorithm. An attacker who
 controls a registered JWK/JWKS private key can sign with a disallowed algorithm, advertise an allowed
 algorithm in the JWT header, and still be accepted. The issue affects the documented
 PyJWKClient.get_signing_key_from_jwt(...) flow. This vulnerability is fixed in 2.13.0. (CVE-2026-48523)

Solution

Update the pyjwt library and its related packages to version 2.13.0-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-48523

Plugin Details

Severity: Medium

ID: 458729

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 2.1

Percentile: 7.77

CVSS v2

Risk Factor: Medium

Base Score: 5.5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-48523

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.9

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/29/2026

Vulnerability Publication Date: 5/28/2026

Reference Information

CVE: CVE-2026-48523