Bouncy Castle Java DHAgreement unvalidated peer exponentiation (<1.85)
CVE-2026-59650 Published on August 3, 2026

MTI/A0 DH agreement exponentiates unvalidated peer value
In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-59650 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE

Weakness Type

Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.


Affected Versions

Legion of the Bouncy Castle Inc. BC-JAVA: Legion of the Bouncy Castle Inc. BC-LTS-JAVA: