CVE-2026-59650

EUVD-2026-52024
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 19.2%
Affected Products (NVD)
VendorProductVersion
bouncycastlebc-java
𝑥
< 1.85
bouncycastlebouncy_castle_for_java_lts
𝑥
≤ 2.73.11
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
bouncycastle
bookworm
vulnerable
forky
vulnerable
sid
vulnerable
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
bouncycastle
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
xenial
needs-triage
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
bouncycastle
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-javadoc
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-mail
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-pg
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-pkix
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-tls
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
bouncycastle-util
Amazon Linux 2023
0:1.70-4.amzn2023.0.8
fixed
Common Weakness Enumeration
Vulnerability Media Exposure
References
https://github.com/bcgit/bc-java/commit/daeaae9d7075d04f40812e68671ebf4c777b5148
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059650