RHSA-2026:97858

Vulnerability from csaf_redhat - Published: 2026-11-10 22:36 - Updated: 2026-11-10 22:38
Summary
Red Hat Security Advisory: python-jwcrypto security update
Severity
Moderate
Notes
Topic: An update for python-jwcrypto is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * jwcrypto: jwcrypto: denial of service via O(n^2) duplicate check on unbounded JWK key_ops array (CVE-2026-92091) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-92091

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.

5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-407 - Inefficient Algorithmic Complexity
Affected products
Product Identifier Version Remediation
Unresolved product id: AppStream-9.9.0.Z.MAIN:python-jwcrypto-0:1.6.1-1.el9_9.src —
Vendor Fix fix
Workaround
Unresolved product id: AppStream-9.9.0.Z.MAIN:python3-jwcrypto-0:1.6.1-1.el9_9.noarch —
Vendor Fix fix
Workaround
Threats
Impact Moderate
References
To clipboard 

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}



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