CVE-2026-71888: BC-JAVA 0 to before 1.86, 1.70 to before 1.86; +2 more affected products

Affected technology

BC-JAVA · 0 to before 1.86
Legion of the Bouncy Castle Inc.

BC-JAVA · 1.70 to before 1.86
Legion of the Bouncy Castle Inc.

BC-LTS-JAVA · 2.73.0 to before 2.73.13
Legion of the Bouncy Castle Inc.

BC-FJA · 1.0.0 to before 1.0.13, 2.0.0 to before 2.0.13, 2.1.0 to before 2.1.13
Legion of the Bouncy Castle Inc.

BC-FJA · 2.0.0 to before 2.0.8, 2.1.0 to before 2.1.8
Legion of the Bouncy Castle Inc.

Description’s affected range: before 1.86

Component: pkix, util
File: CMSAuthenticatedDataParser, AuthenticatedData

Attack conditions (Source advisory, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Source advisory’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and availability impact as none; integrity impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.