Bouncycastle vulnerabilities

We track 23 vulnerabilities in Bouncycastle products across 9 products. 23 are rated high or critical, and none are known to be exploited. The most recent was published on August 3, 2026.

23vulnerabilities

3critical

20high

0exploited

7.8average CVSS score

Latest Bouncycastle vulnerabilities

7.5 High severity
BC-JAVA: Memory Allocation with Excessive Size Value
CVE-2026-14682Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length read. 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),
7.5 High severity
BC-JAVA: Allocation of Resources Without Limits or Throttling
CVE-2026-13586Aug 3, 2026Legion of the Bouncy Castle
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
7.5 High severity
BC-JAVA: Uncontrolled Recursion
CVE-2026-13506Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. 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 serie
8.6 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-12817Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. 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), 2.0.13 (2.
7.5 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-12816Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, IESEngine stream-mode MAC forgery via length-dependent KDF split. This issue also affects Bouncy Castle for Java LTS before 2.73.12.
7.5 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-12803Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, KCCMBlockCipher MAC does not bind nonce when AAD is absent (cross-nonce AEAD forgery). This issue also affects Bouncy Castle for Java LTS before 2.73.12.
7.5 High severity
BC-JAVA: Improper Validation of Integrity Check Value
CVE-2026-12802Aug 3, 2026Legion of the Bouncy Castle
In Bouncy Castle for Java before 1.85, CMS AuthEnvelopedData fails to enforce tag-length on decryption. 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
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: Out-of-bounds Read
CVE-2024-29857May 14, 2024BouncycastleEPSS 1.1%
An issue was discovered in ECCurve.java and ECCurve.cs in Bouncy Castle Java (BC Java) before 1.78, BC Java LTS before 2.73.6, BC-FJA before 1.0.2.5, and BC C# .Net before 2.3.1. Importing an EC certificate with crafted F2m parameters can lead to excessive CPU