CVE-2026-13586 (Medium) detected in bcpkix-jdk18on-1.80.jar, bcprov-jdk18on-1.80.jar

[mend-bolt-for-github]

CVE-2026-13586 - Medium Severity Vulnerability

Vulnerable Libraries - bcpkix-jdk18on-1.80.jar, bcprov-jdk18on-1.80.jar

bcpkix-jdk18on-1.80.jar

The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.8 and up. The APIs are designed primarily to be used in conjunction with the BC Java provider but may also be used with other providers providing cryptographic services.

Library home page: https://www.bouncycastle.org/download/bouncy-castle-java/

Path to dependency file: /OPENAPI-REST-API/openapi-client/kotlin/build.gradle

Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/org.bouncycastle/bcpkix-jdk18on/1.80/5277dfaaef2e92ce1d802499599a0ca7488f86e6/bcpkix-jdk18on-1.80.jar

Dependency Hierarchy:

• ❌ bcpkix-jdk18on-1.80.jar (Vulnerable Library)

bcprov-jdk18on-1.80.jar

The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains the JCA/JCE provider and low-level API for the BC Java version 1.80 for Java 8 and later.

Library home page: https://www.bouncycastle.org/download/bouncy-castle-java/

Path to dependency file: /OPENAPI-REST-API/openapi-client/kotlin/build.gradle

Path to vulnerable library: /tmp/containerbase/cache/.gradle/caches/modules-2/files-2.1/org.bouncycastle/bcprov-jdk18on/1.80/e22100b41042decf09cab914a5af8d2c57b5ac4a/bcprov-jdk18on-1.80.jar

Dependency Hierarchy:

• bcpg-jdk18on-1.80.jar (Root Library)
  • ❌ bcprov-jdk18on-1.80.jar (Vulnerable Library)

Found in HEAD commit: 1f70e2feccb7006c8d32cc7d4fe62f5cf5e5c34d

Found in base branch: master

Vulnerability Details

In Bouncy Castle for Java before 1.85, PKCS#⁠12 MAC and bag-decryption KDF iteration-count bound (DoS). This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

Publish Date: 2026-08-03

URL: CVE-2026-13586

CVSS 3 Score Details (4.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: Low

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Release Date: 2026-08-03

Fix Resolution: 1.85

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