Legion of the Bouncy Castle vulnerabilities

We track 59 vulnerabilities in Legion of the Bouncy Castle products across 6 products. 59 are rated high or critical, and none are known to be exploited. The most recent was published on October 9, 2026.

59vulnerabilities

4critical

55high

0exploited

7.8average CVSS score

Latest Legion of the Bouncy Castle vulnerabilities

9.1 Critical severity
BC-JAVA: Improper Certificate Validation
CVE-2026-58062Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, Stapled OCSP response accepted without binding to the checked certificate. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 2.0.2 (2.0.X series) an
7.5 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-58061Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, CCM-family modes write plaintext to caller buffer before tag check. 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
7.5 High severity
BC-JAVA: Memory Allocation with Excessive Size Value
CVE-2026-58060Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, HSS public-key level count unbounded, enabling huge allocation on verify. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 2.0.2 (2.0.X series) and
7.5 High severity
BC-JAVA: Inefficient Algorithmic Complexity
CVE-2026-58059Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, Quadratic-time escaping when stringifying X.500 distinguished names. 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
9.1 Critical severity
BC-JAVA: Improper Certificate Validation
CVE-2026-8763Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, Name Constraints bypass via trailing dot in rfc822Name and URI. 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
7.5 High severity
BC-JAVA: Inadequate Encryption Strength
CVE-2026-59651Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, BKS keystore accepts legacy version with 16-bit integrity MAC key. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
9.1 Critical severity
In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value.
CVE-2026-59650Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, MTI/A0 DH agreement exponentiates unvalidated peer value. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
7.5 High severity
BC-JAVA: Memory Allocation with Excessive Size Value
CVE-2026-59649Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, OpenPGP user-attribute subpacket length bounded only by JVM max memory. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2
7.5 High severity
BC-JAVA: Memory Allocation with Excessive Size Value
CVE-2026-59646Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bctls-fips 1.0.24 (1.0.X series)
7.5 High severity
BC-JAVA: Uncontrolled Recursion
CVE-2026-59645Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, OER parser recurses without depth limit on self-referential IEEE 1609.2 schema. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcutil-fips 2.0.7 (2.0.X s
7.5 High severity
BC-JAVA: Improper Verification of Cryptographic Signature
CVE-2026-59643Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, OpenPGP inline-signature policy failures silently ignored. This issue also affects Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 2.0.13.
7.5 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-59642Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, CMS AuthenticatedData content not bound to MAC when authAttrs present. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series),
7.5 High severity
BC-JAVA: Improper Verification of Cryptographic Signature
CVE-2026-59639Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, CMS verifySignatures returns true for SignedData with zero signers. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0
8.2 High severity
BC-JAVA: Allocation of Resources Without Limits or Throttling
CVE-2026-15055Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, PKCS#8 / PBES2 decryptors honour unbounded KDF cost from input. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpkix-fips 1.0.12 (1.0.X series), 2.0.12
8.6 High severity
BC-JAVA: Memory Allocation with Excessive Size Value
CVE-2026-12185Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, BKS/UBER keystore allocates from untrusted lengths before integrity check. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
7.5 High severity
BC-JAVA: Covert Timing Channel
CVE-2026-5598Apr 15, 2026Legion of the Bouncy CastleEPSS 1.17%
Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.81.1, from
7.5 High severity
BC-JAVA: Use of a Broken or Risky Cryptographic Algorithm
CVE-2026-5588Apr 15, 2026Legion of the Bouncy Castle
Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpki
7.5 High severity
BC-JAVA: Uncontrolled Resource Consumption
CVE-2026-3505Apr 15, 2026Legion of the Bouncy Castle
Allocation of resources without limits or throttling, Uncontrolled Resource Consumption vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpg on all (pg modules). This vulnerability is associated with program files AEADEncDataPacket.Java, BcAEADUtil.J
7.5 High severity
BC-JAVA: Use of a Broken or Risky Cryptographic Algorithm
CVE-2025-14813Apr 15, 2026Legion of the Bouncy Castle
: 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 1.8