In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
History

Thu, 10 Sep 2026 22:45:00 +0000

Type Values Removed Values Added
Title Incomplete RSA Signature Validation in OCaml jose Before 0.11.0

Thu, 10 Sep 2026 22:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 10 Sep 2026 20:00:00 +0000

Type Values Removed Values Added
Description In the jose package before 0.11.0 for OCaml, library calls to validate an RSA signature only confirm that PKCS #1 decoding succeeds, and proceed to declare the signature valid without the required steps that involve the public key.
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 9.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-10T19:52:47.039Z

Updated: 2026-09-10T21:00:25.030Z

Reserved: 2026-09-10T19:52:46.560Z

Link: CVE-2026-89086

cve-icon Vulnrichment

Updated: 2026-09-10T20:55:23.339Z

cve-icon NVD

Status : Received

Published: 2026-09-10T20:17:32.113

Modified: 2026-09-10T21:17:52.570

Link: CVE-2026-89086

cve-icon Redhat

No data.