Inefficient Algorithmic Complexity in jwcrypto - CVE-2026-92091
Published: September 17, 2026
Vulnerability identifier: #VU150672
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92091
CWE-ID: CWE-407
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient algorithmic complexity in the JWK.import_key key_ops duplicate check when processing attacker-supplied JWK key_ops arrays. A remote attacker can submit a JWK containing many distinct key_ops values to cause a denial of service.
Only applications that pass attacker-controlled JWKs or JWK Sets to a public import API are affected.
Affected software
jwcrypto
How to mitigate CVE-2026-92091
Install security update from vendor's website.
jwcrypto - update to 1.6.1