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Echo: python-jwcrypto: security update to 1.5.6-1.1~deb13u1+e1

medium Tenable Self-Hosted Container Security Plugin ID 478335

Description

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

 - A flaw was found in jwcrypto. The JWK.import_key() function validates the key_ops JWK member for duplicate
 values using an algorithm with O(n^2) time complexity, and the length of key_ops is not bounded. A remote,
 unauthenticated attacker can supply a JWK with a large key_ops array to an application that passes
 attacker-controlled key material to a public key-import API (reachable via ECDH-ES key agreement, OIDC
 dynamic client registration, DPoP, or ACME account key registration, among others) to consume excessive
 CPU time, resulting in a denial of service. (CVE-2026-92091)

Solution

Update the python-jwcrypto library and its related packages to version 1.5.6-1.1~deb13u1+e1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-92091

Plugin Details

Severity: Medium

ID: 478335

Version: Revision 1.1

Type: Local

Published: 11/4/2026

Updated: 11/4/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.6

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2026-92091

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 11/4/2026

Vulnerability Publication Date: 9/16/2026

Reference Information

CVE: CVE-2026-92091