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).
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
Passive
Minimal interaction
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
legion of the bouncy castle inc.:bc-fja
legion of the bouncy castle inc.:bc-java
legion of the bouncy castle inc.:bc-lts-java
References 4
https://github.com/bcgit/bc-java/commit/75d60dfb4ca72bea6da96234138bc9b1556ef5b0
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https://github.com/bcgit/bc-java/commit/fa59cc23502f73def89d94374540cc92af647b96
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https://github.com/bcgit/bc-java/wiki/CVE-2026-13586
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https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9013586
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