Resource exhaustion in Bouncy Castle for Java and Bouncy Castle for Java LTS - CVE-2026-59648

Vulnerability identifier: #VU146462

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2026-59648

CWE-ID: CWE-400

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in OpenPGP Argon2 S2K processing when honoring attacker-chosen memory and passes. A remote attacker can supply crafted OpenPGP data to cause a denial of service.

Bouncy Castle for Java
Bouncy Castle for Java LTS
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Development Tools Module
Guardium Cryptography Manager
Total Storage Service Console (TSSC) / TS4500 IMC
ApplinX
webMethods Integration Server
webMethods BPM
IBM Sterling Control Center
IBM SPSS Collaboration and Deployment Services
IBM Maximo Application Suite - Manage Component
bouncycastle-pkix
bouncycastle
bouncycastle-pg
bouncycastle-util

Install security update from vendor's website.

Bouncy Castle for Java - update to 1.85
Bouncy Castle for Java LTS - update to 2.73.12
Guardium Cryptography Manager - update to 2.0.3.0
IBM Sterling Control Center - addressed in versions 6.3.1.0.11, 6.4.2.0.7
IBM Maximo Application Suite - Manage Component - addressed in versions 9.0.29, 9.1.21, 9.2.2
bouncycastle-pkix - update to 1.85-150200.3.38.1
bouncycastle - update to 1.85-150200.3.38.1
bouncycastle-pg - update to 1.85-150200.3.38.1
bouncycastle-util - update to 1.85-150200.3.38.1
webMethods Integration Server - addressed in versions 10.15 Fix 18, 11.1 Fix 9
webMethods BPM - addressed in versions 10.15 Fix 18, 11.1 Fix 9

• https://www.openwall.com/lists/oss-security/2026/08/04/2
• https://www.bouncycastle.org/resources/new-release-bouncy-castle-java-1-85/

• Multiple vulnerabilities in Bouncy Castle Java
• SUSE update for bouncycastle
• Multiple vulnerabilities in IBM SPSS Collaboration and Deployment Services
• Multiple vulnerabilities in IBM ApplinX
• Multiple vulnerabilities in IBM webMethods Integration
• Multiple vulnerabilities in IBM Maximo Application Suite - Manage Component
• Multiple vulnerabilities in IBM Sterling Control Center
• Multiple vulnerabilities in IBM Guardium Cryptography Manager
• Multiple vulnerabilities in Total Storage Service Console (TSSC) / TS4500 IMC