CVE-2026-59650 - Vulnerability Details - OpenCVE

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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00263.

Exploitation none

Automatable yes

Technical Impact total

No data.

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products

References

Link	Providers
https://github.com/bcgit/bc-java/commit/daeaae9d7075d04f40812e68671ebf4c777b5148
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059650

History

Mon, 03 Aug 2026 14:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Mon, 03 Aug 2026 05:30:00 +0000

Type	Values Removed	Values Added
References	https://github.com/bcgit/bc-java/wiki/CVE-2026-59650	https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059650

Mon, 03 Aug 2026 01:15:00 +0000

Type	Values Removed	Values Added
Description		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.
Title		MTI/A0 DH agreement exponentiates unvalidated peer value
Weaknesses		CWE-20
References		https://github.com/bcgit/bc-java/commit/daeaae9d7075d04f40812e68671ebf4c777b5148 https://github.com/bcgit/bc-java/wiki/CVE-2026-59650
Metrics		cvssV4_0 `{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber'}`

MITRE

Status: PUBLISHED

Assigner: bcorg

Published: 2026-08-03T00:42:46.157Z

Updated: 2026-08-03T13:32:53.676Z

Reserved: 2026-07-06T07:09:01.524Z

Link: CVE-2026-59650

Vulnrichment

Updated: 2026-08-03T13:32:49.732Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-08-03T09:15:03Z

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