Broken GOSTCTR Algorithm in Bouncy Castle BC-Java bcprov <1.84
CVE-2025-14813 Published on April 15, 2026
GOSTCTR implementation unable to process more than 255 blocks correctly
: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcprov on all (core modules).
This vulnerability is associated with program files G3413CTRBlockCipher.
This issue affects BC-JAVA: from 1.59 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84.
Weakness Type
Use of a Broken or Risky Cryptographic Algorithm
The use of a broken or risky cryptographic algorithm is an unnecessary risk that may result in the exposure of sensitive information. The use of a non-standard algorithm is dangerous because a determined attacker may be able to break the algorithm and compromise whatever data has been protected. Well-known techniques may exist to break the algorithm.
Products Associated with CVE-2025-14813
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Affected Versions
Legion of the Bouncy Castle Inc. BC-JAVA:- Version 1.59 and below 1.80.2 is affected.
- Version 1.81 and below 1.81.1 is affected.
- Version 1.82 and below 1.84 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.