CVE-2026-59644 HIGH

CVE-2026-59644: MLS hash-ratchet honours arbitrary 32-bit generation counter from sender

Vendor Legion Of The Bouncy Castle Inc.
Product BC-JAVA
Weakness CWE-834
Published August 3, 2026
Last update August 3, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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/U:Amber

What the vulnerability does

01Description

In Bouncy Castle for Java before 1.85, MLS hash-ratchet honours arbitrary 32-bit generation counter from sender.

Key dates

02Disclosure timeline

August 3, 2026 CVE published
August 3, 2026 Record updated