CVE Database›Document archive›CVE-2026-59650

CVE-2026-59650

bouncycastle: Bouncy Castle for Java: Cryptographic key compromise due to unvalidated Diffie-Hellman peer value

Loading…

Severity

Important

Red Hat Product Security

7.4

CVSS 3.1

Review impact separately from score.

Published · August 3, 2026

Updated · September 24, 2026

Description

A flaw was found in Bouncy Castle for Java. The software fails to validate Diffie-Hellman peer values during key agreement. A remote attacker can exploit this flaw to compromise cryptographic keys, potentially leading to the decryption of sensitive communications or successful impersonation.

Statement

This is an Important vulnerability where Bouncy Castle for Java, as used in Red Hat products, fails to validate Diffie-Hellman peer values during key agreement. This flaw allows a remote attacker to compromise cryptographic keys, potentially leading to the decryption of sensitive communications or successful impersonation, due to the low attack complexity and lack of required user interaction.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE-325 · Missing Cryptographic Step